brain

HSK 4 | noun | one's overall pattern of eating and drinking

HSK 3 | verb | to feel regret about a past action

HSK 1 | verb | to help, to assist

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

水 (sui/mizu): water. JLPT N5 kanji.

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

HSK 3 | verb | to hang something up or be suspended

Mastering 之、乎、者、也 and the grammar of classical Chinese in modern scholarly and literary contexts.

HSK 4 | verb / adjective | bringing something to a higher or complete standard

A dinner is represented as a sequence of flowers. A red flower contributes length 1, while white flowers are special: they may only appear in contiguous groups of exactly k flowers.

HSK 4 | verb / noun | to show; to perform; performance; behavior

送る (おくる / okuru): to send. N4 level Japanese vocabulary.

HSK 4 | noun | what is needed or wanted, especially in an economic or practical sense

HSK 3 | adjective | widely recognized; renowned

HSK 3 | verb/noun | to inspire someone to try or keep going

Sindarin mixed mutation: the third mutation type triggered by definite prepositions — the complete change table, all triggering constructions, and worked examples.

HSK 5 | noun/adjective | spirit, mind, essence; energetic, lively

人 (jin/nin/hito): person. JLPT N5 kanji.

Perfect passive with PPP + esse, pluperfect active and passive, future perfect active, and Latin temporal sequence.

HSK 5 | verb / noun | to evaluate; assessment

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

HSK 5 | noun/preposition | basis; grounds; according to; based on

HSK 1 | adjective | cheap, inexpensive, affordable

HSK 5 | n/v | the act or art of telling a story; narrative mode in literature

Sindarin's Celtic origins, how Tolkien built place names from roots, and analysis of 25+ famous Middle-earth place names.

HSK 8 vocabulary reference: advanced C2-level words in specialist academic disciplines, technology, and professional domains.

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

HSK 1 | verb | to live at a place, to stay somewhere

HSK 3 | noun | an interconnected system; the internet

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

HSK 4 | n | activities or media that provide amusement

Learn 〜につれて (as ~ changes, proportionally) — expressing gradual co-change where two things change together.

HSK 5 | noun | a standard pattern or model of operation or behavior

HSK 3 | adjective | calm and free from noise

HSK 5 | noun | a specific instance or example used for analysis, typically in law, medicine, or business

右 (u/yuu/migi): right. JLPT N5 kanji.

N1 grammar pattern 〜のみか: literary 'not only X but also Y,' escalating from X to the more surprising/larger Y. Formal and literary register.

HSK 4 | verb / adverb | to compare; relatively; fairly

HSK 3 | noun | the function, role, or effect that something produces

HSK 4 | noun | a favorable moment or occasion

Exploring how classical Chinese grammar and vocabulary permeate formal Modern Chinese — 所 nominalization, 之 particle, and registers of elegance

上 (up, above): 3 strokes, JLPT N5. On: ジョウ、ショウ. Kun: うえ、うわ、のぼ-る.

We are given several stacks of unit cubes, each stack having an initial height. In a single move, we can take exactly one cube from the top of one stack and place it on top of another stack.

耳 (ear): 6 strokes, JLPT N5. On: ジ. Kun: みみ.

青 (sei/shou/ao): blue. JLPT N5 kanji.

HSK 1 | number | the digit seven

HSK 4 | phrase | indicating that something deserves attention or is important to observe

HSK 5 | noun | cultural cultivation, personal literacy, core competency

Learn 〜に従って (in accordance with / as ~ progresses) — the N3 pattern for expressing compliance with rules and proportional change.

HSK 4 | noun | payment made electronically over the internet

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

赤 (seki/shaku/aka): red. JLPT N5 kanji.

HSK 5 | noun | regular, predictable pattern or law governing phenomena

Master Esperanto's location and movement prepositions, and learn the crucial rule for adding -n to show direction versus static position.

HSK 3 | noun | the deeper significance or importance of something

HSK 5 | noun | innate ability or formal qualification for a role

Master the Japanese counting system, learn to tell time, and express dates accurately to navigate daily life in Japan.

HSK 3 | adjective | indicating many different varieties

〜てしまう: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.

一 (one): 1 strokes, JLPT N5. On: イチ、イツ. Kun: ひと、ひと-つ.

HSK 5 | noun phrase | the practice of protecting and preserving the natural environment

HSK 3 | noun/adjective | a deep sense of contentment and well-being

HSK 1 | noun | informal word for mother

HSK 4 | noun | the deeper value or significance of something

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.

HSK 2 | noun | hotel; guest house; lodging establishment

HSK 5 | verb/noun | to communicate; mutual exchange of information or feelings

HSK 3 | verb | to give as a gift, deliver, or accompany someone when they leave

Essential Japanese vocabulary for trains, buses, taxis, traffic, directions. N1 level reference with readings, romaji, and examples.

HSK 3 | adjective / noun | lively, bustling, full of activity and noise

N1 grammar pattern 〜をよそに: expressing that someone proceeds obliviously or indifferently to something (worries, expectations, circumstances) that should be relevant to them.

HSK 3 | adjective | of great significance or consequence; not to be overlooked

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 4 | verb/adjective | to negate, to deny; negative

HSK 3 | verb/noun | to consult or use as a reference

Learn how Esperanto's unlimited compounding system works to create precise, expressive vocabulary from simple roots.

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

HSK 1 | greeting phrase | asks about someone's wellbeing

HSK 2 | verb | to swim; also used as a noun for the sport of swimming

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

HSK 4 | noun | friend; companion

HSK 4 | adjective / noun | patient; patience

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

HSK 3 | noun | bread; a baked flour product

HSK 4 | noun | a person who is ill or receiving medical treatment

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

HSK 3 | grammar pattern | expresses whether an action can or cannot achieve its result

HSK 4 | verb / noun | making or experiencing a shift in condition or nature

語 (language, word): 14 strokes, JLPT N5. On: ゴ. Kun: かた-る、かた-らう.

HSK 4 | noun/adj | customs and practices passed down through generations

HSK 4 | verb | to make smaller or narrower

HSK 4 | verb | to make changes to improve or correct something

HSK 4 | noun | the range or scope of something

HSK 5 | verb / noun | to come into existence; the birth or emergence of something

Complete reference of the 1,026 Kyoiku kanji (教育漢字) taught in Japanese elementary school grades 1–6, with stroke counts, key readings, and meanings.

Learn five productive Esperanto prefixes that multiply your vocabulary by expressing opposites, beginnings, repetition, dispersal, and errors.

HSK 3 | verb / noun | to criticize, point out faults; criticism

HSK 3 | noun | a system of communication used by a group of people

HSK 5 | noun/adjective | a prolonged period of abnormally low rainfall; dry and parched

入 (enter): 2 strokes, JLPT N5. On: ニュウ. Kun: い-る、い-れる、はい-る.