brain

HSK 1 | noun | train, railway

HSK 3 | noun | a project or planned undertaking; a listed item or entry

We have a lineup of ponies, each with three attributes: their current mana, their maximum mana, and their mana regeneration rate per unit time. Over time, Lord Tirek performs several operations called Absorb Mana, each targeting a consecutive segment of ponies.

今 (kon/kin/ima): now. JLPT N5 kanji.

We are given an $n times n$ grid that is mostly empty, except for a small number of cells that are already fixed as either x or o. Every other cell must be filled with one of these two characters.

HSK 4 | adjective | not direct; operating through an intermediate step

国 (country): 8 strokes, JLPT N5. On: コク. Kun: くに.

Sindarin future tense: continuative future (-tha- infix) and simple future forms, all 6 persons — with the famous le linnathon as a worked example.

HSK 3 | verb | to check, to inspect, to examine — used for medical or general review

Report and discuss news using 据...报道, 消息说, and media vocabulary at B1 level.

HSK 2 | verb | pivotal causative verb: let someone do, make someone do

HSK 1 | measure word | classifier for long, narrow, or flexible objects

A deep study of Esperanto's literary tradition, major authors, poetic devices, and the evolution from Zamenhof's early verse to modern prose.

HSK 1 | noun | the middle of the day, around 12 p.m.

Learn how to use 〜ばかりか (bakari ka) to express 'not only ~ but even ~' with an emphasis on escalating or surprising addition. Includes structure, nuance, examples, and comparisons.

HSK 3 | conjunction | introduces a concessive clause, acknowledging an obstacle while asserting a contrasting result

HSK 3 | noun | a story, tale, or narrative

HSK 3 | noun | chopsticks, the traditional East Asian eating utensils

Master the full range of concessive and adversative structures in Esperanto, from kvankam and malgraŭ to spite ke, eĉ se, and sen ke.

十 (ten): 2 strokes, JLPT N5. On: ジュウ、ジッ. Kun: とお、と.

Express nuanced doubt and negation using 没有...那么, 不见得, 未必, and related patterns at B1 level.

HSK 4 | adjective | serious; earnest; conscientious; careful

HSK 4 | n | a legal or moral entitlement to do or have something

HSK 4 | verb | shielding someone or something from harm

HSK 3 | preposition | indicates that one thing changes or develops together with another

HSK 3 | adverb | indicates an estimate rather than an exact figure

HSK 5 | verb | to put a plan, policy, or law into action

HSK 3 | noun | a public announcement promoting a product or service

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

HSK 5 | noun | a critical moment of serious danger, difficulty, or instability

円 (en/maru-i): yen (currency). JLPT N5 kanji.

HSK 1 | adjective | difficult, hard. Antonym: 容易 (róngyi)

N1 grammar pattern 〜とばかりに: describing a manner or attitude 'as if to say ~, with the air of ~' — the subject's action speaks louder than words.

HSK 4 | verb | to promote, to popularize, to extend

Learn to describe your daily routine using V + 了 for completed actions and sequence time words.

HSK 5 | conjunction | to the extent that; so much so that; resulting in

HSK 3 | adverb | describes slow, incremental change over time

HSK 5 | noun | ability, capability, capacity to do something

HSK 5 | verb/noun | to take action in advance to stop something harmful from occurring

HSK 5 | verb/noun | conversion or transformation between forms/states

Complete N2 vocabulary reference: academic, political, scientific, medical, and social vocabulary. ~2,250 new words beyond N3, organized by theme.

Sindarin adjectives: post-nominal position, lenition after nouns, plural forms, and the copula 'to be'.

HSK 1 | noun | restaurant, eatery

Learn environmental vocabulary and the grammar patterns 越来越 + adj and 变得 + adj to describe change over time, a key pattern in discussing environmental issues.

HSK 4 | adjective | rude, impolite, rough in manner

HSK 6 | n | the principles of valid reasoning; the internal coherence of an argument or situation

HSK 4 | verb/noun | to demonstrate truth with evidence; a document certifying a fact

HSK 4 | verb | deliberating together to reach a decision or understanding

Full paradigms for 4th-declension masculine and neuter nouns and 5th-declension nouns, with key vocabulary and the special behavior of domus.

HSK 3 | verb | to abandon or stop pursuing something

HSK 3 | adverb | never — habitual negation applying to all past and present time

HSK 2 | adjective | feeling that expectations have been met

HSK 3 | verb/noun | to recall the past; a memory or recollection

HSK 3 | noun | a tool or instrument used to accomplish a task

HSK 1 | adverb | intensifier before adjectives; also a default linking tone

HSK 3 | adverb pattern | describes a quality increasing progressively over time

HSK 5 | noun / verb | cognitive understanding; the process of knowing

HSK 3 | verb | to increase, add to, or grow in number or amount

HSK 2 | adjective / noun | male gender; a man or boy

HSK 5 | verb/noun | to limit or restrict the scope of action; a constraint or limitation

How to create grammatically correct Sindarin place names: element vocabulary, compound patterns, mutation at seam, and 20 worked example name constructions.

Side-by-side comparison of Sindarin and Quenya: phonology, grammar, vocabulary, and cultural context — for understanding both languages and avoiding confusion between them.

HSK 3 | noun | experience gained through practice or living, not academic knowledge

HSK 5 | conjunction | therefore, as a result, consequently

七 (seven): 2 strokes, JLPT N5. On: シチ. Kun: なな、なな-つ、なの.

HSK 1 | adverb/noun | the day after today

HSK 4 | adjective | proceeding without obstacles or difficulties

HSK 4 | adjective | having many interrelated parts that are difficult to understand or deal with

HSK 3 | modal verb | must, have to — expresses strong obligation or necessity

HSK 5 | noun | a legal member of a state with rights and responsibilities

Japanese nature vocabulary: weather, animals, plants, landscape, environment, and natural phenomena.

HSK 5 | adjective | producing the desired result; legally or formally valid

HSK 1 | verb | to have a fondness or preference for something

食 (shoku/jiki/ta-beru): eat. JLPT N5 kanji.

HSK 1 | verb, noun | to end, to finish, the end

HSK 4 | verb/noun | to provide explanation or commentary

HSK 4 | noun | risk; danger; hazard

HSK 5 | noun | the surface or point of interaction between two systems or entities

HSK 1 | pronoun | second-person plural pronoun

HSK 4 | noun | the forward progress or development of something

Introduction to learning Japanese kanji: the Joyo list, reading types, JLPT distribution, top 50 most common kanji, and choosing a learning method.

HSK 5 | noun | abstract mental representation or intellectual construct

HSK 3 | verb | to create or found something new

HSK 3 | noun | face; facial expression; social face, dignity

HSK 5 | adjective/verb | thorough; penetrating deeply into a topic or place

There are $m$ complete decks, each containing the same $n$ card values. After mixing all decks together, there are $mn$ physical cards in total, and every value appears exactly $m$ times.

HSK 5 | noun | the capacity or power to remember

HSK 4 | noun | client, customer

Learn how direction complements combine with verbs to describe movement toward or away from the speaker, a key feature of Mandarin spatial expression.

N1 grammar patterns 〜極まりない and 〜極まる: expressing that something is extremely [negative quality], often used to express outrage, embarrassment, or strong negative evaluation.

N1 grammar pattern 〜に即して/〜に即した: applying a principle or standard directly to specific circumstances. Formal register, used in legal, academic, and policy contexts.

HSK 6 | n | the line or path of one's thinking; a way of approaching a problem

HSK 5 | noun | overarching institutional or governmental system

HSK 2 | verb/adverb | please (polite request), to invite, to treat someone

HSK 4 | verb | the active process of acquiring knowledge or skills

HSK 3 | conjunction | concessive condition — even in an extreme hypothetical case, the result still holds

Learn how result complements attach to verbs to express the outcome or completion of an action, a fundamental building block of Mandarin grammar.

HSK 4 | adjective | particular and detailed rather than vague or abstract

HSK 5 | verb | upward movement or increase in quantity, level, or degree

男 (dan/nan/otoko): man. JLPT N5 kanji.