brain

HSK 5 | noun | information cocoon; filter bubble; echo chamber

HSK 3 | verb | to accept, to receive, to take in willingly

HSK 2 | measure word / adjective | counts items that come in pairs

HSK 4 | noun | a specific action taken to achieve a goal or solve a problem

HSK 3 | verb | to board or travel by a vehicle

N1 grammar: classical auxiliary ごとし expressing literary simile ('like / as though'). Used in literary prose, proverbs, and formal descriptive writing.

HSK 5 | noun | ethics; ethical principles; moral philosophy

Sindarin personal pronouns: subject, object, and possessive forms — with worked examples from attested texts.

We start with a connected undirected graph. Every edge must be assigned a direction. After all directions are chosen, some ordered pairs of vertices $(u,v)$ will satisfy that there is a directed path from $u$ to $v$. The goal is not to make the graph strongly connected.

HSK 6 | n | a shared understanding or agreement reached among multiple parties

HSK 1 | noun | a calendar year; also used in age and duration expressions

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 4 | verb | to transfer data from the internet to a device

HSK 5 | verb / noun | to assess or appraise systematically; an evaluation

HSK 1 | noun | classroom

Form and use the imperfect (ongoing past) and future tenses for all four conjugations and esse.

HSK 3 | grammar pattern | conditional conjunction expressing minimum sufficient condition

HSK 4 | verb / noun | believing in someone's reliability or integrity

HSK 3 | verb | to abandon or stop pursuing something

HSK 5 | noun | model example, exemplary case, paradigm

The task asks for the remainder when the sum of the first four multiples of a very large number n is divided by 5. In other words, you need to compute (1n + 2n + 3n + 4n) mod 5.

海 (kai/umi): sea. JLPT N5 kanji.

HSK 5 | adjective | existing below the surface; not yet apparent; potential

HSK 1 | verb | to exchange goods for money

HSK 3 | noun | fruit — edible fruit of a plant

HSK 3 | noun | season — one of the four seasons of the year

HSK 5 | noun | chronic disease; long-term illness that persists over time

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

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

HSK 5 | noun | thinking; thought process; cognitive approach

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

HSK 3 | noun | actor, actress, performer

HSK 4 | noun | experience gained through practice or life

HSK 5 | noun | the central claim or argument in a piece of reasoning

HSK 3 | noun | neck, the part of the body connecting the head to the shoulders

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

HSK 3 | verb | to remember something firmly; to commit to memory

HSK 3 | verb | to manage, to be in charge of; to bother with, to concern oneself with

We have all lattice points inside and on the boundary of an axis-aligned rectangle whose opposite corners are (0, 0) and (n, m). The task is to choose four distinct lattice points and connect them in the chosen order.

HSK 4 | noun | the central idea or topic of a work or discussion

水 (water): 4 strokes, JLPT N5. On: スイ. Kun: みず.

HSK 4 | noun | an aim or destination one works toward

HSK 6 | verb | to bring together disparate elements into a unified whole

Words 201–500 from the DCC Latin Core list — the next 300 most frequent Latin words after Band 1. Complete before moving to Band 3.

HSK 5 | noun | the variety of life forms in a given environment

HSK 3 | noun / conjunction | result, outcome; as a result, consequently

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

〜らしい: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.

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

HSK 6 | n | the structural skeleton or conceptual framework of a system, plan, or argument

HSK 6 | n/v | a proposition or thesis; the act of setting an examination question or essay topic

HSK 1 | conjunction | introduces a reason or cause, paired with 所以

HSK 5 | noun | the substance or information contained within something

The task is to evaluate a simple arithmetic expression of the form a?b where a and b are integers between 1 and 999, and ? is a single operator from the set +, -, , /, or %.

HSK 1 | verb | seeing or viewing in multiple senses

HSK 4 | noun | a formal gathering for discussion or decision-making

HSK 3 | verb / particle | to wait; and so on, et cetera (sentence-final particle)

HSK 5 | verb/noun | fundamental shift in state or direction

黒 (koku/kuro): black. JLPT N5 kanji.

HSK 1 | verb | to jump, to leap, to dance

Language for navigating cultural difference — expressions for cultural contrast, conflict, fusion, and the pragmatics of intercultural interaction at C1 level

HSK 5 | n | literary prose; an essay or lyrical prose piece

HSK 3 | noun | a facility where aircraft take off and land

HSK 5 | noun | cybersecurity, protection of computer networks and data

HSK 4 | noun | an official document certifying achievement or qualification

HSK 2 | phrase | standard response to thanks; also means 'don't be polite'

HSK 5 | discourse marker | in other words; to put it another way

HSK 4 | verb/noun | granting official permission or power to someone

Learn how to use 〜さえ〜ば (sae ~ ba) to express the minimum sufficient condition — 'if only ~, then everything is fine.' Includes structure, nuance, examples, and comparisons.

HSK 5 | noun phrase | the warming of Earth's atmosphere due to trapped heat

HSK 8 | noun | materials science; the interdisciplinary study of material structure, properties, and applications

HSK 2 | adjective / noun | describes physical or mental well-being

HSK 5 | adjective/verb | prosperous, thriving; to prosper, to flourish

HSK 1 | number | ten thousand; the base large-number unit in Chinese counting

HSK 6 | verb | to sum up the essential points; to state in broad terms

HSK 4 | conjunction | although; even though; though

HSK 4 | adverb | expressing a combined total

HSK 6 | verb | to promote and carry forward something of cultural or moral value

HSK 5 | verb | to complicate, to make more complex, to become complicated

Master 〜に従い and 〜に従って to express compliance with rules, instructions, or gradual change in formal Japanese.

Learn to link ideas, sentences, and paragraphs using coordinating and subordinating conjunctions and discourse markers for coherent, flowing Esperanto.

HSK 4 | n/v | a formal vote to choose a person for a position

HSK 4 | verb / noun | having an effect on something or someone

We are given the beauty values of n flowers. We must choose exactly two flowers. Among all possible pairs, we are interested only in pairs whose beauty difference is as large as possible.

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

HSK 5 | verb/noun | to consume goods or services; consumption

犬 (dog): 4 strokes, JLPT N5. On: ケン. Kun: いぬ.

HSK 1 | adverb | still (ongoing), also/in addition, even more

HSK 1 | greeting phrase | affirms agreement or acknowledges a request

HSK 5 | verb / noun | to sum up; to draw conclusions; a summary

HSK 2 | adverb / adjective | intensifier meaning 'especially' or describing something as unique

Regular and irregular comparative and superlative adjectives, formation of comparative and superlative adverbs, and ablative of comparison vs. quam.

Master topic-comment sentence structure and topic-introducing expressions like 说到, 关于, and 对于 at B1 level.

HSK 3 | adverb | after much effort or trouble; not easy at all to achieve

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

HSK 1 | number | the digit two; used in isolation, ordinals, and compound numbers

A comprehensive review of all A2 grammar patterns and key vocabulary from HSK 3, with integrated exercises for exam preparation.

HSK 4 | noun / verb | an activity, event, or campaign; to move around

HSK 5 | verb / adjective | to suppress, to repress; stifling, oppressive

Engage with Chinese scientific discourse, technology journalism, and research communication using specialized vocabulary and evidence-based grammar patterns.