brain

tamnd's digital brain — notes, problems, research

41970 notes

如果 (rúguǒ) — if; supposing that

HSK 1 | conjunction | introduces a conditional clause

hsk-1vocabularya1
〜とばかりに — JLPT N1 Grammar

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.

japanesegrammarn1jlpt
感受 (gǎnshòu) — feeling; to feel; to experience

HSK 5 | noun/verb | subjective feeling; to feel or experience something

hsk-5vocabularyb2
利益 (lìyì) — interest, benefit

HSK 6 | n | interests, benefits, or gains — especially in political, economic, or social contexts

hsk-6vocabularyc1
承认 (chéngrèn) — to admit; to acknowledge; to recognize

HSK 4 | verb | accepting or confirming a fact, mistake, or status

hsk-4vocabularyb1
白 (bái) — white; in vain

HSK 2 | adjective/adverb | the color white; also means without result or free of charge

hsk-2vocabularya1
Lesson 9: Pronouns — Object & Dative

Sindarin object pronouns and the dative construction with an: direct object pronoun forms, indirect object, and attested examples.

sindaringrammarpronounsbeginner
协商 (xiéshāng) — to negotiate, to consult

HSK 5 | verb/noun | to discuss and reach agreement through mutual consultation

hsk-5vocabularyb2
我们 (wǒmen) — we, us

HSK 1 | pronoun | first-person plural pronoun

hsk-1vocabularya1
意见 (yìjiàn) — opinion

HSK 3 | noun | opinion, view, feedback — what someone thinks about something

hsk-3vocabularya2
丢 (diū) — to lose; to misplace

HSK 3 | verb | to lose or accidentally leave something behind

hsk-3vocabularya2
特点 (tèdiǎn) — characteristic, feature

HSK 4 | noun | distinguishing feature or characteristic

hsk-4vocabularyb1
点击率 (diǎnjī lǜ) — Click-through rate, click rate

HSK 5 | noun | the percentage of users who click on a link or ad; click-through rate

hsk-5vocabularyb2
适合 (shìhé) — to suit; suitable; appropriate

HSK 3 | verb / adjective | to be suited to; to fit well with a person, purpose, or situation

hsk-3vocabularya2
百 — Kanji Reference

百 (hundred): 6 strokes, JLPT N5. On: ヒャク. Kun: none.

japanesekanjin5writing
收购 (shōugòu) — to acquire, acquisition

HSK 5 | verb / noun | to purchase a company or large quantity of goods; a takeover or buyout

hsk-5vocabularyb2
管理 (guǎnlǐ) — management; to manage

HSK 5 | verb/noun | to manage, administer, or oversee; management

hsk-5vocabularyb2
按时 (ànshí) — on time; punctually

HSK 4 | adverb | doing something at the scheduled or required time

hsk-4vocabularyb1
〜も — Also; Too; Even
japanesegrammarn5particles
心理咨询 (xīnlǐ zīxún) — psychological counseling

HSK 5 | noun | psychological counseling; mental health consultation

hsk-5vocabularyb2
Lesson 7: Shopping and Money

Learn to ask prices, talk about money, and use the 多少钱 question structure in shops and markets.

hsk-1lessona1
上 — JLPT N5 Kanji

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

japanesekanjin5jlpt
公斤 (gōngjīn) — kilogram

HSK 2 | measure word/noun | the metric unit of weight equal to one kilogram

hsk-2vocabularya1
模型 (móxíng) — model

HSK 5 | noun | a physical, mathematical, or conceptual representation of a system or object

hsk-5vocabularyb2
网络 (wǎngluò) — network; internet

HSK 3 | noun | an interconnected system; the internet

hsk-3vocabularya2
Supplement 8: Vocabulary — Emotions & Abstract Concepts

Sindarin words for emotions, philosophical concepts, and states of being — including the key philosophical terms estel, amarth, and gûr that Tolkien embedded in his Elvish worldview.

sindarinvocabularyemotionsphilosophyintermediate
N4 Kanji: 会 (Meet, Gather)

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

japanesen4jlptkanjilanguage-learning
Travel & Transportation

Esperanto vocabulary for travel, transportation, directions, accommodation, and tourism.

esperantovocabularytraveltransportationtourism
玩 (wán) — to play / to have fun

HSK 1 | verb | to play, to have fun, to hang out

hsk-1vocabularya1
边缘化的 (biānyuánhuà de) — marginalized

HSK 5 | adjective | pushed to the margins; excluded from mainstream society

hsk-5vocabularyb2
费用 (fèiyòng) — fee; cost; expense

HSK 4 | noun | money spent or charged for a service or activity

hsk-4vocabularyb1
味道 (wèidào) — flavor, taste

HSK 4 | noun | the sensation perceived by the tongue when eating or drinking

hsk-4vocabularyb1
JLPT N3 — Kanji (184 New, 651 Cumulative)

Complete N3 kanji reference: 184 new kanji beyond N4, organized by meaning category. Includes stroke counts, on-yomi, kun-yomi, example words, and tricky reading notes.

japanesejlptjlpt-n3kanjilanguage-learning
早上 (zǎoshang) — morning, early morning

HSK 1 | noun | the early part of the day, from dawn to around 9 a.m.

hsk-1vocabularya1
N4 Kanji: 頭 (Head)

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

japanesen4jlptkanjilanguage-learning
直播 (zhíbō) — live broadcast; to livestream

HSK 5 | verb/noun | a real-time audio or video transmission to an audience

hsk-5vocabularyb2
〜のもとで / 〜のもとに — JLPT N2 Grammar

Learn 〜のもとで and 〜のもとに to express acting under conditions, authority, supervision, or established premises.

japanesegrammarn2jlpt
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
经验 (jīngyàn) — experience

HSK 5 | noun | experience, practical knowledge gained through doing

hsk-5vocabularyb2
因为 (yīnwèi) — because

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

hsk-1vocabularya1
逐渐 (zhújiàn) — gradually; little by little

HSK 4 | adverb | describing slow, incremental change over time

hsk-4vocabularyb1
引导 (yǐndǎo) — to guide; to lead

HSK 4 | verb | to guide; to lead; to direct

hsk-4vocabularyb1
期间 (qījiān) — period; duration; during

HSK 4 | noun | a span of time or a period during which something occurs

hsk-4vocabularyb1
CF 465B - Inbox (100500)

Codeforces 465B: Inbox (100500)

codeforcescompetitive-programmingimplementation
网络 (wǎngluò) — network; online

HSK 5 | noun/adjective | network; the internet; online

hsk-5vocabularyb2
出现 (chūxiàn) — to appear / to emerge / to occur

HSK 3 | verb | to come into view or to happen for the first time

hsk-3vocabularya2
督促 (dūcù) — to urge; to supervise and push

HSK 5 | verb | to urge someone to do something through supervision or prompting

hsk-5vocabularyb2
具体 (jùtǐ) — specific, concrete

HSK 5 | adjective/adverb | clearly defined and detailed, not abstract or vague

hsk-5vocabularyb2
工程师 (gōngchéngshī) — engineer

HSK 4 | noun | engineer

hsk-4vocabularyb1
策略 (cèlüè) — strategy; tactic; approach

HSK 4 | noun | a strategy, tactic, or planned approach to achieving a goal

hsk-4vocabularyb1
〜ずにはおかない — JLPT N1 Grammar

N1 grammar pattern 〜ずにはおかない: expressing that something inevitably happens or that the speaker will certainly do something — 'cannot help but, will surely, is bound to.'

japanesegrammarn1jlpt
做 (zuò) — to do, to make

HSK 1 | verb | general verb for doing or making something

hsk-1vocabularya1
到处 (dàochù) — everywhere

HSK 3 | adverb | everywhere, all over — in every place, with no location excluded

hsk-3vocabularya2
进程 (jìnchéng) — process, progress

HSK 6 | n | the course or advancement of a process, especially a large-scale historical or social development

hsk-6vocabularyc1
平衡 (pínghéng) — balanced; to balance

HSK 4 | adjective/verb | the state of being in balance or equilibrium

hsk-4vocabularyb1
Sindarin Courses

All Sindarin online courses — from beginner to advanced — with detailed descriptions, lesson counts, and what each covers.

sindarincourseslearningtolkien
考虑 (kǎolǜ) — to consider

HSK 3 | verb | to consider, to think over, to take into account

hsk-3vocabularya2
请求 (qǐngqiú) — to request; request

HSK 3 | verb/noun | to make a request or an appeal

hsk-3vocabularya2
体制 (tǐzhì) — system, institutional structure

HSK 5 | noun | overarching institutional or governmental system

hsk-5vocabularyb2
高 (gāo) — tall / high

HSK 1 | adjective | tall, high, of great height

hsk-1vocabularya1
起床 (qǐchuáng) — to get up / to get out of bed

HSK 1 | verb phrase | to get up, to rise from bed

hsk-1vocabularya1
西 — Kanji Reference

西 (west): 6 strokes, JLPT N5. On: セイ、サイ. Kun: にし.

japanesekanjin5writing
不但 (búdàn) — not only

HSK 3 | conjunction | not only — the first half of the 不但…而且… pattern

hsk-3vocabularya2
害怕 (hàipà) — to be afraid

HSK 3 | verb | to be afraid, to fear, to be scared

hsk-3vocabularya2
信息茧房 (xìnxī jiǎnfáng) — information cocoon; filter bubble

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

hsk-5vocabularyb2
〜と — And; With (Accompaniment)
japanesegrammarn5particles
词典 (cídiǎn) — dictionary

HSK 3 | noun | a dictionary, especially one that explains words and their meanings

hsk-3vocabularya2
六 (liù) — six

HSK 1 | number | the digit six; considered lucky in Chinese culture

hsk-1vocabularya1
没关系 (méi guānxi) — it's okay; no problem

HSK 1 | greeting phrase | reassures someone after an apology

hsk-1vocabularya1
Supplement 9: Vocabulary — Expanded Nature & Animals

Deep-dive into Sindarin nature vocabulary: sky, weather, water, plants, trees, and animals — with all attested forms and place name evidence.

sindarinvocabularynatureanimalsplantsintermediate
关系 (guānxi) — relationship; connection; to matter

HSK 4 | noun / verb | ties between people or things, or relevance

hsk-4vocabularyb1
図 — JLPT N5 Kanji

図 (zu/to/haka-ru): map. JLPT N5 kanji.

japanesekanjin5jlpt
合适 (héshì) — suitable; appropriate; fitting

HSK 4 | adjective | right for a particular purpose or situation

hsk-4vocabularyb1
JLPT N2 Lesson 8: Stance and Perspective

Master how to express viewpoint, unexpected contrast, and conditional dependency in formal Japanese — 〜として, 〜からすると, 〜にしては, 〜わりに, and 〜次第で.

japanesen2lessonjlpt
昨 — JLPT N5 Kanji

昨 (saku/): yesterday. JLPT N5 kanji.

japanesekanjin5jlpt
实践 (shíjiàn) — practice; to put into practice

HSK 5 | noun/verb | practical application of theory; to apply knowledge in real action

hsk-5vocabularyb2
问 (wèn) — to ask

HSK 1 | verb | to ask, to inquire

hsk-1vocabularya1
施治 (shīzhì) — to treat, administer treatment

HSK 7 | verb | formal medical term for applying therapeutic intervention to a patient

hsk-7vocabularyc2
光纤 (guāngxiān) — fiber optics

HSK 8 | noun | fiber optics; thin glass or plastic fibers transmitting data as light pulses

hsk-8vocabularyc2
南 — JLPT N5 Kanji

南 (ナン・ナ/みなみ): south. JLPT N5 essential kanji.

japanesekanjin5jlpt
黒 — JLPT N5 Kanji

黒 (koku/kuro): black. JLPT N5 kanji.

japanesekanjin5jlpt
计划 (jìhuà) — plan

HSK 3 | noun / verb | a plan or program; to plan something in advance

hsk-3vocabularya2
本质 (běnzhì) — essence; nature; intrinsic

HSK 4 | noun | the fundamental nature or essence of something

hsk-4vocabularyb1
HSK 3 Vocabulary (499 New Words)

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-3vocabularyhska2chinese
及时 (jíshí) — timely; in good time; promptly

HSK 3 | adjective/adverb | done without unnecessary delay when needed

hsk-3vocabularya2
表示 (biǎoshì) — to indicate; to express; to show

HSK 4 | verb | to communicate or signal a feeling, attitude, or meaning

hsk-4vocabularyb1
腐败 (fǔbài) — corruption; corrupt

HSK 5 | noun/adjective/verb | corruption; corrupt; to decay, rot

hsk-5vocabularyb2
Lesson 11: Pronouns — Personal, Reflexive, and Demonstrative

Full tables for personal, reflexive, and demonstrative pronouns; the cum enclitic; and the absence of a true 3rd-person personal pronoun.

latinnovicelesson
系统 (xìtǒng) — system; systematic

HSK 5 | noun/adjective | system; systematic, comprehensive

hsk-5vocabularyb2
Lesson 7: News & Journalism Style

The inverted pyramid, news leads, and the register conventions of Chinese journalism — reading and producing newswriting at C1 level

hsk-6lessonc1
JLPT N1 Lesson 9: N1 Listening — Strategies, Scripts, and Pitch Accent

Master the N1 listening section: natural native speed (400+ chars/min), implied meaning, speaker stance inference, pitch accent minimal pairs, note-taking for long monologues, and analysis of five authentic-difficulty listening scripts.

japanesen1lessonjlptlisteningpitch accentn1 strategy
义务 (yìwù) — duty; obligation

HSK 5 | noun | duty; obligation; obligatory service

hsk-5vocabularyb2
間 — JLPT N5 Kanji

間 (kan/ken/aida): interval. JLPT N5 kanji.

japanesekanjin5jlpt
南 — Kanji Reference

南 (south): 9 strokes, JLPT N5. On: ナン、ナ. Kun: みなみ.

japanesekanjin5writing
放弃 (fàngqì) — to give up; to abandon

HSK 4 | verb | to stop pursuing or holding onto something

hsk-4vocabularyb1
动词+不/得+结果 — verb + potential complement

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

hsk-3vocabularya2grammar
休闲 (xiūxián) — leisure, recreation

HSK 4 | n/adj | free time activities; relaxed and casual

hsk-4vocabularyb1
卖 (mài) — to sell

HSK 1 | verb | to exchange goods for money

hsk-1vocabularya1
HSK 9 Vocabulary (~1,880 New Words)

HSK 9 vocabulary reference: the highest level of the HSK standard, covering literary, classical, and culturally rich Chinese vocabulary.

hsk-9vocabulary
难 (nán) — difficult

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

hsk-1vocabularya1