brain

tamnd's digital brain — notes, problems, research

43815 notes

属性 (shǔxìng) — attribute, property

HSK 5 | noun | intrinsic property or attribute belonging to something

hsk-5vocabularyb2
部署 (bùshǔ) — to deploy; deployment

HSK 5 | verb/noun | to arrange and position forces, resources, or plans strategically

hsk-5vocabularyb2
Sindarin Advanced Level (Mesteth — Mastery)

Advanced Sindarin: primary source scholarship, Neo-Sindarin evaluation, advanced composition, and engaging with the Tolkien linguistics community.

sindarinadvancedscholarshiptolkien
数字化 (shùzìhuà) — digitalization, to digitize

HSK 5 | noun / verb | the process of converting to digital form or integrating digital technology

hsk-5vocabularyb2
鳥 — JLPT N5 Kanji

鳥 (チョウ/とり): bird. JLPT N5 essential kanji.

japanesekanjin5jlpt
方案 (fāng'àn) — plan; scheme; program; proposal

HSK 4 | noun | a detailed plan or scheme for achieving something

hsk-4vocabularyb1
既然 (jìrán) — since

HSK 3 | conjunction | since, now that, given that — accepts a premise and draws a conclusion from it

hsk-3vocabularya2
地图 (dìtú) — map

HSK 3 | noun | map — a visual representation of an area used for navigation

hsk-3vocabularya2
文明 (wénmíng) — civilization; civilized

HSK 4 | noun / adjective | civilization or being civilized

hsk-4vocabularyb1
Lesson 1: The Alphabet and Pronunciation

Master Esperanto's 28-letter phonemic alphabet, including the six diacritic letters and the X-system alternative.

esperantoa1lesson
上 — JLPT N5 Kanji

上 (jou/shou/ue): above. JLPT N5 kanji.

japanesekanjin5jlpt
营销 (yíngxiāo) — marketing

HSK 5 | noun/verb | marketing; to market (products or services)

hsk-5vocabularyb2
〜にかかわらず — JLPT N2 Grammar

Learn 〜にかかわらず to express that something applies regardless of a condition or variable, in formal Japanese.

japanesegrammarn2jlpt
Lesson 15: A1 Review and Consolidation

A comprehensive review of all A1 grammar, 100 essential vocabulary words, key survival phrases, and guidance on the path to A2.

esperantoa1lesson
工程师 (gōngchéngshī) — engineer

HSK 4 | noun | engineer

hsk-4vocabularyb1
担心 (dānxīn) — to worry; worried

HSK 3 | verb/adjective | to feel anxious or concerned about something

hsk-3vocabularya2
根本 (gēnběn) — fundamental, root; fundamentally, at all

HSK 5 | adjective / adverb / noun | basic and essential; at the most basic level; not at all (negative)

hsk-5vocabularyb2
生 — Kanji Reference

生 (life, birth): 5 strokes, JLPT N5. On: セイ、ショウ. Kun: いき-る、うま-れる、なま.

japanesekanjin5writing
技能 (jìnéng) — skill; ability

HSK 4 | noun | skill; technical ability; competence

hsk-4vocabularyb1
生态系统 (shēngtài xìtǒng) — ecosystem

HSK 5 | noun | a system of interacting organisms and their environment

hsk-5vocabularyb2
再见 (zàijiàn) — goodbye; see you

HSK 1 | greeting phrase | standard farewell expression

hsk-1vocabularya1
体系 (tǐxì) — system, framework, structure

HSK 5 | noun | organized and interconnected system of elements

hsk-5vocabularyb2
明白 (míngbai) — to understand / clear

HSK 3 | verb / adjective | to understand, to be clear about something

hsk-3vocabularya2
N4 Kanji: 員 (Member, Employee)

JLPT N4 kanji 員 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.

japanesen4jlptkanjilanguage-learning
归结 (guījié) — to attribute to; to boil down to

HSK 5 | verb | to trace back to a cause; to attribute; to come down to

hsk-5vocabularyb2
关键 (guānjiàn) — key; crucial; pivotal; the crux

HSK 3 | adj/noun | the most important or decisive element

hsk-3vocabularya2
由于 (yóuyú) — due to, because of

HSK 4 | conjunction / preposition | indicating cause or reason

hsk-4vocabularyb1
班 (bān) — class / shift

HSK 3 | noun | class, classroom group; work shift; scheduled service

hsk-3vocabularya2
午 — JLPT N5 Kanji

午 (go/): noon. JLPT N5 kanji.

japanesekanjin5jlpt
破产 (pòchǎn) — bankruptcy; to go bankrupt

HSK 5 | verb/noun | the state of being unable to repay debts; financial insolvency

hsk-5vocabularyb2
Lesson 21: Advanced Reading Skills

Develop systematic strategies for reading complex Chinese texts efficiently, including contextual inference, identifying main ideas, and detailed comprehension.

hsk-5lessonb2
Lesson 4: Reported Speech and Indirect Discourse

Master Esperanto's system of indirect speech, including tense non-backshift, reported questions, and commands in ke-clauses.

esperantob2lesson
〜ものがある (there is a quality of — ineffable characteristic)

N1 grammar pattern 〜ものがある: expressing that something has an ineffable quality or characteristic that the speaker cannot easily put into words but strongly senses.

japanesen1grammarjlptものがある
N4 Kanji: 病 (Illness, Sick)

JLPT N4 kanji 病 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.

japanesen4jlptkanjilanguage-learning
确认 (quèrèn) — to confirm; to verify; confirmation

HSK 4 | verb/noun | to establish with certainty that something is true or agreed upon

hsk-4vocabularyb1
可爱 (kě'ài) — cute; lovely

HSK 3 | adjective | cute, adorable, or lovely

hsk-3vocabularya2
複雑な (ふくざつな) — Japanese Vocabulary

複雑な (ふくざつな / fukuzatsu na): complicated. N4 level Japanese vocabulary.

japanesevocabularyn4adj-na
长 (cháng) — long

HSK 1 | adjective | long (in length or duration)

hsk-1vocabularya1
教育 (jiàoyù) — education

HSK 3 | noun | education; the process of teaching and learning

hsk-3vocabularya2
Lesson 7: Stylistic Registers

Recognize and produce Esperanto in four distinct registers — literary, journalistic, scientific, and colloquial — with appropriate vocabulary and syntactic choices.

esperantob2lesson
烹饪 (pēngrèn) — to cook, cooking

HSK 4 | verb/noun | the art or act of preparing food by applying heat

hsk-4vocabularyb1
Lesson 5: Scientific Writing

Result and method clauses in Chinese scientific prose — vocabulary, structure, and the conventions of academic argumentation in Chinese research writing

hsk-6lessonc1
流媒体 (liú méitǐ) — streaming

HSK 4 | noun | media content delivered continuously over the internet

hsk-4vocabularyb1
Lesson 3: Numbers and Counting

Learn Esperanto numbers from zero to a million, including ordinals, fractions, and arithmetic expressions.

esperantoa1lesson
模式 (móshì) — model; pattern; mode

HSK 4 | noun | a pattern, mode, or established model of operation

hsk-4vocabularyb1
生产 (shēngchǎn) — to produce; production

HSK 5 | verb/noun | the process of manufacturing or creating goods

hsk-5vocabularyb2
精确 (jīngquè) — precise; accurate

HSK 5 | adjective | precise, exact, accurate

hsk-5vocabularyb2
JLPT N5 Lesson 2: First Conversations — Greetings and Self-Introduction

Master the essentials of Japanese introductions, polite greetings, and basic sentence structure to start your first conversations with confidence.

japanesen5lessonjlpt
Lesson 17: Verbs — Present Tense

Complete Sindarin verb conjugation for present tense: aorist (simple) and continuative (ongoing) for both A-stem and primary verb classes, all 6 persons.

sindaringrammarverbspresent-tenseintermediate
表现 (biǎoxiàn) — to show; performance

HSK 3 | verb/noun | behavior, performance, or how something manifests

hsk-3vocabularya2
星期 (xīngqī) — week; day of the week

HSK 1 | noun | a week; combined with numbers 1–6 or 日/天 to name weekdays

hsk-1vocabularya1
Lesson 19: Intransitive Verbs & Irregular Stems

Sindarin intransitive verbs, class 3 i-verbs, irregular stems with suppletive roots, and half-strong verb formation.

sindaringrammarverbsirregularintermediate
CF 479A - Expression

Codeforces 479A: Expression

codeforcescompetitive-programmingbrute-forcemath
学期 (xuéqī) — school term; semester

HSK 3 | noun | a division of the academic year

hsk-3vocabularya2
Lesson 7: Plurals Part 2

Advanced Sindarin plural patterns: monosyllables, diphthong shifts, vowel intrusion, class plurals (-ath, -rim, -hoth), and the definite article with plurals.

sindaringrammarpluralsintermediate
站 (zhàn) — to stand / station

HSK 1 | verb, noun | to stand, a stop or station

hsk-1vocabularya1
苦 (kǔ) — bitter

HSK 4 | adjective | having a sharp, unpleasant taste; also describing hardship

hsk-4vocabularyb1
〜てあげる — Japanese Grammar

〜てあげる: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.

japanesegrammarn4giving
稳定 (wěndìng) — stable; to stabilize

HSK 5 | adjective/verb | not changing or fluctuating; to make or become steady

hsk-5vocabularyb2
苦恼 (kǔnǎo) — troubled; distressed

HSK 5 | adjective/verb | feeling troubled, distressed, or tormented; to trouble

hsk-5vocabularyb2
审核 (shěnhé) — to review; to audit; to verify

HSK 5 | verb | to examine and check something carefully for accuracy or compliance

hsk-5vocabularyb2
年 — Kanji Reference

年 (year): 6 strokes, JLPT N5. On: ネン. Kun: とし.

japanesekanjin5writing
Work and Business Vocabulary

Japanese work and business vocabulary: professions, office settings, keigo expressions, job hunting terms, and workplace culture.

japanesevocabularyworkbusinessjlpt-n3language-learning
Lesson 5: Specialized Vocabulary — Law

Mastering 法律文书 writing conventions and the specialized register of Chinese legal discourse.

hsk-7lessonc2
急救 (jíjiù) — first aid; emergency rescue

HSK 5 | noun/verb | first aid; emergency medical treatment

hsk-5vocabularyb2
智能手机 (zhìnéng shǒujī) — smartphone

HSK 4 | noun | a mobile phone with advanced computing capabilities

hsk-4vocabularyb1
明天见 (míngtiān jiàn) — see you tomorrow

HSK 1 | greeting phrase | farewell used when you will meet the person the next day

hsk-1vocabularya1
白 — Kanji Reference

白 (white): 5 strokes, JLPT N5. On: ハク、ビャク. Kun: しろ、しら、しろ-い.

japanesekanjin5writing
HSK 4 Vocabulary (1,000 New Words)

Complete HSK 4 vocabulary reference: approximately 1,000 new words at B1 level, organized by semantic category with pinyin, English, part of speech, and usage notes.

hsk-4vocabulary
吧 (ba) — suggestion and assumption particle

HSK 2 | particle | softens suggestions, assumptions, and tag questions

hsk-2vocabularya1
懂 (dǒng) — to understand; to know how

HSK 2 | verb | to grasp the meaning of a skill, language, or subject; contrast with 明白

hsk-2vocabularya1
安静 (ānjìng) — quiet; calm; peaceful

HSK 2 | adjective | describes an absence of noise or disturbance

hsk-2vocabularya1
〜てこそ / 〜ばこそ (precisely because — emphatic reason)

N1 grammar patterns 〜てこそ and 〜ばこそ: using the classical emphatic particle こそ to express that something is meaningful or possible precisely because of X.

japanesen1grammarjlptてこそばこそ
Lesson 6: Concessive and Causal Connectives

Master the paired connectives 虽然...但是, 因为...所以, and 尽管...还是 to express contrast and cause-effect relationships in complex sentences.

hsk-3lessona2
孕育 (yùnyù) — to nurture; to give rise to

HSK 5 | verb | to foster, incubate, or bring forth something new

hsk-5vocabularyb2
讨论 (tǎolùn) — to discuss

HSK 3 | verb / noun | to discuss, talk over; a discussion

hsk-3vocabularya2
考える (かんがえる) — Japanese Vocabulary

考える (かんがえる / kangaeru): to think, consider. N4 level Japanese vocabulary.

japanesevocabularyn4verb-ru
Lesson 11: Letter and Email Writing at B2

Master formal, semi-formal, and informal letter and email writing in Esperanto, including structure, formulaic expressions, and epistolary conventions.

esperantob2lesson
〜を — Direct Object Marker
japanesegrammarn5particles
指标 (zhǐbiāo) — indicator; target; index

HSK 5 | noun | indicator; metric; target figure used to measure performance or status

hsk-5vocabularyb2
Lesson 10: Oral Defense Skills

Mastering the rhetoric of 答辩: presenting, fielding challenges, and closing arguments in Chinese academic and professional oral defense.

hsk-7lessonc2
调查 (diàochá) — to investigate; survey; investigation

HSK 4 | verb/noun | to gather information systematically through research or examination

hsk-4vocabularyb1
〜ないではすまない (social obligation — modern variant)

N1 grammar pattern 〜ないではすまない: modern variant of 〜ずにはすまない. Cannot avoid doing X due to social/moral necessity. Slightly more contemporary in feel.

japanesen1grammarjlptないではすまないobligation
Lesson 13: Talking About the Past

Use the experiential aspect marker 过 and contrast 以前 with 以后 to discuss past experiences and changes.

hsk-2lessona1
N4 Kanji: 工 (Work, Craft, Construction)

JLPT N4 kanji 工 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.

japanesen4jlptkanjilanguage-learning
专家 (zhuānjiā) — expert; specialist

HSK 4 | noun | a person with deep knowledge in a specific field

hsk-4vocabularyb1
治疗师 (zhìliáoshī) — therapist

HSK 4 | noun | a trained professional who provides therapy or treatment

hsk-4vocabularyb1
规则 (guīzé) — rule / regulation

HSK 4 | noun | rule; regulation; norm

hsk-4vocabularyb1
短信 (duǎnxìn) — text message

HSK 3 | noun | text message, SMS, short message

hsk-3vocabularya2
涌现 (yǒngxiàn) — to emerge in large numbers

HSK 5 | verb | to emerge; to spring up; to appear in abundance

hsk-5vocabularyb2
成为 (chéngwéi) — to become; to turn into

HSK 3 | verb | to become something through change or development

hsk-3vocabularya2
水果 (shuǐguǒ) — fruit

HSK 4 | noun | the sweet or sour fleshy product of a tree or plant

hsk-4vocabularyb1
Lesson 5: Cross-Register Fluency

Mastering the full Chinese register continuum: shifting between formal, informal, written, spoken, and specialized registers with native-level control.

hsk-8lessonc2
Lesson 18: Participles — Active and Passive

All four Latin participles (PAP, PPP, FAP, gerundive), their formation and declension, and the ablative absolute construction with worked examples.

latinnovicelesson
車 — JLPT N5 Kanji

車 (sha/kuruma): vehicle. JLPT N5 kanji.

japanesekanjin5jlpt
Kanji Radicals (部首)

Reference guide to the 214 classical radicals (bushu) used in Japanese kanji — with meanings, stroke counts, variant forms, and key example kanji.

japanesekanjiradicalsbushulanguage-learning
JLPT N2 Lesson 7: Time and Occasion Patterns

Master formal Japanese time and occasion markers used in official speeches, ceremonies, and business announcements — 〜にあたって, 〜に際して, 〜に先立って, and more.

japanesen2lessonjlpt
想象力 (xiǎngxiànglì) — imagination; imaginative power

HSK 5 | noun | imagination; the power or capacity to imagine

hsk-5vocabularyb2
污染 (wūrǎn) — Pollution, to pollute

HSK 5 | noun/verb | contamination of the environment; to contaminate

hsk-5vocabularyb2
互联网 (hùliánwǎng) — the Internet

HSK 5 | noun | the Internet; the World Wide Web

hsk-5vocabularyb2