brain
tamnd's digital brain — notes, problems, research
43815 notes
HSK 1 | adjective, adverb | slow, slowly
HSK 4 | verb / noun | regulating or restraining something within bounds
土 (earth, soil): 3 strokes, JLPT N5. On: ド、ト. Kun: つち.
HSK 6 | n/v | established standard or norm; to bring into conformity with a standard
HSK 3 | verb/noun | systematic investigation or study of a subject
HSK 6 | verb | to bear the weight of; to carry (physical load or abstract meaning/responsibility)
HSK 3 | noun/verb | an activity, event, or to move around
JLPT N4 kanji 便 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.
HSK 4 | noun | a set of instructions for preparing a dish
Learn how to use 〜につれて (ni tsurete) to express parallel change — 'as ~ happens, ~ also changes.' Includes structure, nuance, examples, and comparisons.
HSK 4 | conjunction | introducing an additional point beyond what was stated
HSK 3 | noun | a mirror; a reflective surface used to see one's reflection
だから (だから / dakara): therefore, so. N4 level Japanese vocabulary.
HSK 4 | noun | opportunity; favorable chance
We need to print an n × n chessboard using characters. White squares are represented by . and black squares by . The square in the top-left corner is white, and colors alternate both horizontally and vertically exactly as on a real chessboard.
夜 (ya/yoru): night. JLPT N5 kanji.
HSK 5 | verb | to complicate, to make more complex, to become complicated
HSK 1 | noun | company, corporation, firm
Learn 〜わけではない (it doesn't mean that ~, it's not that ~) — the N3 partial negation pattern for correcting over-generalizations and assumptions.
語 (language, word): 14 strokes, JLPT N5. On: ゴ. Kun: かた-る、かた-らう.
Master Japanese giving and receiving verbs — あげる, もらう, くれる — and their て-form benefactive extensions 〜てあげる, 〜てもらう, 〜てくれる. Learn the in-group/out-group (uchi/soto) social rules that govern their use.
HSK 2 | verb / noun | to draw or paint; a picture or painting
HSK 5 | noun | an advantage, gain, or benefit that serves one's goals or welfare
HSK 5 | adjective/adverb | going all the way; leaving nothing incomplete
HSK 3 | noun/verb | hobby or personal interest
HSK 4 | verb/noun | to write down or keep a record of something
HSK 5 | noun | the capacity or power to have an effect on others' behavior or thinking
We are asked to count how many different moments in time Little X can wake up such that he overlaps with Little Z online. Little Z has a fixed schedule consisting of multiple segments.
HSK 4 | verb/noun | to propose a course of action; a recommendation offered to others
〜てもらう: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.
The task is to compute the Hamming distance between two strings of equal length. In practical terms, you are comparing two sequences of letters and counting how many positions contain different characters. Each mismatch contributes exactly one to the distance.
HSK 6 | conj | used to extend a range to include an extreme or unexpected member
HSK 3 | noun/adjective | a deep sense of contentment and well-being
川 (river): 3 strokes, JLPT N5. On: セン. Kun: かわ.
HSK 5 | verb / noun | to give a full explanation or interpretation of something
HSK 4 | noun | a person's current emotional state or feeling
HSK 1 | noun | bed
HSK 4 | verb/noun | an official notification or briefing
HSK 5 | verb/noun | to report to a superior; a formal report or briefing
HSK 1 | adverb | indicates that something happens later or with more difficulty than expected
HSK 5 | adjective/adverb | expressing the idea of being contrary or the reverse
HSK 6 | n/v | concrete manifestation; to give concrete expression to an abstract quality
Master formal written Chinese grammar patterns and register-appropriate vocabulary for academic and professional contexts.
HSK 3 | pronoun | referring to the subject themselves
Discuss urban living, infrastructure, and city development using 在 + city + 生活/工作 and city vocabulary at B1 level.
HSK 1 | noun | things, stuff (idiomatic); east-west (literal)
Develop professional-level simultaneous and consecutive interpretation skills between Esperanto and national languages at congresses and formal events.
Master both meanings of 〜次第: 'as soon as ~' (formal temporal) and 'depends on ~' (conditional) — essential for N3 business communication.
書 (sho/ka-ku): write. JLPT N5 kanji.
HSK 3 | noun | the post office; a government postal service location
HSK 4 | verb | to make something larger in scope or size
All Sindarin prepositions with their mutation triggers: soft, nasal, and mixed — with worked examples and the dative/genitive constructions.
HSK 4 | verb | to bring up an idea, question, or suggestion for consideration
N1 grammar pattern 〜をもって: expressing means or instrument (by means of, with), or a temporal boundary (as of, with this).
HSK 4 | noun | a span of time or a period during which something occurs
Master the vocabulary and grammar of Chinese legal and political discourse, enabling engagement with official documents, legal texts, and political commentary.
HSK 5 | noun | an institutional system that holds officials or organisations responsible for their conduct
HSK 1 | greeting phrase | expresses gratitude
HSK 3 | verb | to continue or keep doing something
HSK 3 | verb | to move, to carry, to relocate
N1 grammar pattern 〜ともなると/〜ともなれば: when it comes to reaching the level/stage/position of X, certain things naturally follow. Formal register.
南 (south): 9 strokes, JLPT N5. On: ナン、ナ. Kun: みなみ.
〜が (ga): JLPT N5 grammar pattern. Usage, structure, examples, and comparison with は.
HSK 3 | verb | to chase after someone or something; to pursue a goal or person
HSK 3 | noun | an opportunity or favorable occasion to do something
HSK 6 | n/adj | a recognized expert or authoritative source; having recognized authority
HSK 5 | noun / verb | the process of embedding AI or smart technology into systems and products
〜てみる: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.
HSK 3 | verb | to give, submit, or establish a connection
All Sindarin online courses — from beginner to advanced — with detailed descriptions, lesson counts, and what each covers.
HSK 4 | adjective | feeling of anxiety, or a taut/scarce situation
五 (go/itsu-tsu): five. JLPT N5 kanji.
HSK 3 | adjective | going smoothly, without obstacles or setbacks
HSK 6 | n/adj | a system of governance by the people; the quality of being open, participatory, or egalitarian
Learn how to use 〜を通じて (wo tsujite) to express 'through,' 'throughout,' or 'via' when describing a medium, channel, or continuous span. Includes structure, nuance, examples, and comparisons.
Dialectical reasoning, materialist philosophy, and the vocabulary of ethics — engaging with Chinese and Western philosophical discourse at C1 level
Learn to order food and drinks, express what you want to eat using 想 and 要, and talk about Chinese cuisine.
HSK 4 | verb / noun | pointing out faults or shortcomings
HSK 1 | noun | school, educational institution
We are given a sequence of pylons arranged in a line, starting from position 0 up to position n. The first pylon is fixed at height 0, and every other pylon has a given height.
A review lesson integrating all novice grammar in context: sentence-by-sentence analysis of two Latin passages, a curriculum summary, and independent reading practice.
HSK 5 | adjective | having the qualities of democracy; based on popular participation
HSK 2 | verb | to think (that), to consider, to hold an opinion
HSK 1 | verb phrase | to get up, to rise from bed
HSK 5 | noun | a set of official rules or regulations issued by a government body
HSK 1 | noun | apple
HSK 3 | conjunction | as long as, provided that — states the minimum condition for a result
HSK 4 | verb/noun | to give the reason or meaning of something; to clarify or justify
We are given a fixed amount of money expressed in dollars, and a list of sugar options in a supermarket. Each option has a price written as dollars and cents.
Complete HSK 3 vocabulary reference: 499 new words introduced at A2 level. Organized by category with Chinese, pinyin, English, part of speech, and example sentences.
HSK 6 | n | the cognitive faculty of thinking; a mode or pattern of thought
口 (mouth, opening): 3 strokes, JLPT N5. On: コウ、ク. Kun: くち.
HSK 3 | adj/adv | shared by all parties or done collectively
HSK 5 | noun | non-fossil energy sources such as solar, wind, and hydrogen power
HSK 4 | verb/noun | to assess a situation and reach a conclusion; the act of judging
HSK 1 | number | the digit seven
We are given exactly six stick lengths. To build an animal, four of the sticks must be used as legs, which means those four sticks must all have the same length. After choosing the four leg sticks, two sticks remain. These determine the animal type.
Sindarin sentence structure: VSO order, subordinate clauses, relative clauses, negation, and complex sentence examples.