brain
tamnd's digital brain — notes, problems, research
41968 notes
HSK 5 | adjective | firm and well-grounded; not reckless or volatile
HSK 1 | verb | expresses desire, thought, and longing
All Sindarin negation forms: ú- prefix, avo imperative negation, baw prohibition, and law/lav forms — with attested examples and contextual usage.
HSK 1 | noun | coffee
HSK 6 | n | facts, examples, or reasoning used to support an argument
HSK 3 | adjective / adverb | special, particular; especially, particularly
HSK 2 | measure word | counts complete pieces of written or composed work
HSK 5 | verb / noun | to raise capital; the act of financing
HSK 3 | noun | a project or planned undertaking; a listed item or entry
HSK 3 | verb | to check, to inspect, to examine — used for medical or general review
HSK 3 | verb | to look after, take care of, or attend to someone's needs
HSK 5 | verb / noun | to argue opposing sides; formal debate
HSK 3 | verb | to register, to sign up, to enroll
Learn to build complex sentences using subordinating conjunctions: ke, ĉar, kvankam, se, kiam, por ke, and indirect questions.
HSK 4 | adverb/conjunction | introducing additional information
HSK 3 | verb / adjective | to understand, to be clear about something
HSK 5 | noun/verb | to export goods; an exit or way out
HSK 3 | noun | one's particular way of seeing or interpreting something
HSK 4 | verb/noun | the act of choosing or a choice made
Learn to talk about your hobbies, ask yes/no questions, and use the -ad- suffix for ongoing activities.
〜ば: JLPT N4 grammar pattern. Usage, structure, examples, and comparison with similar patterns.
HSK 5 | noun | ability, capability, capacity to do something
Complete treatment of Sindarin na- (to be): present nâ, past nant, future natha, imperative no, and predicative adjective construction.
JLPT N4 kanji 図 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.
Form and use the imperfect (ongoing past) and future tenses for all four conjugations and esse.
HSK 5 | noun | a public forum for discussion; an online discussion board
HSK 3 | adverb | used with negation to mean 'never' or 'not once'
Learn to talk about what you like doing and what skills you have using 喜欢 and 会.
The conventions of Chinese historical writing — 历史叙述 style, evaluative vocabulary, and the language of historical significance and controversy
HSK 5 | noun | an official plan or course of action adopted by a government or organization
HSK 4 | verb | officially occupying a role or post
HSK 1 | noun / measure word | mouth, opening, bite-sized portions
HSK 3 | noun / verb | summary, conclusion; to summarize, to wrap up
HSK 4 | adjective / verb | thorough and deep; to go deep into something
HSK 1 | measure word | classifier for cups, glasses, and their contents
HSK 5 | verb | to confirm; to acknowledge as correct
HSK 5 | noun/verb | initiative; proposal; to put forward a proposal or call to action
Master the two types of Japanese adjectives to describe people, places, and things with precision and natural flair.
A rigorous analysis of Esperanto's participial system — the -ata/-ita controversy, compound tenses, participial nouns, and verbal adjectives with full semantic precision.
HSK 3 | noun | a public announcement promoting a product or service
HSK 5 | noun/adjective | a person or organization's public image; also vivid/concrete representation
HSK 5 | noun | duty; obligation; obligatory service
HSK 3 | verb | to prepare, get ready, or plan to do something
HSK 5 | discourse marker | in summary; in short; to sum up
自然 (しぜん / shizen): nature. N4 level Japanese vocabulary.
HSK 4 | noun | a software application designed for a specific purpose
HSK 3 | verb | to board or travel by a vehicle
HSK 3 | noun | a word or short phrase in Chinese
Esperanto numbers, counting, arithmetic, ordinals, fractions, and mathematical vocabulary.
HSK 2 | noun | noodles, a staple food made from wheat flour
HSK 1 | adverb | also, too — adds the same information about the subject
中 (chuu/naka): inside. JLPT N5 kanji.
HSK 4 | verb / noun | making or experiencing a shift in condition or nature
HSK 3 | verb | to receive, to collect, to put away
Sindarin possessive pronouns: suffix forms attached to nouns, independent possessive forms, and the genitive construction with en.
HSK 5 | noun | background, backdrop, context, personal connections
HSK 3 | grammar pattern | describes a quality that keeps intensifying over time
HSK 5 | verb | to launch; to introduce; to put forward
JLPT N4 kanji 教 — readings, vocabulary, stroke order, mnemonic, and common confusion pairs.
Learn 〜をめぐって and 〜をめぐる to discuss debates, controversies, and disputes surrounding a topic in formal Japanese.
HSK 5 | noun/adjective | economy, economics; economical, affordable
We are given an $n times n$ matrix where each entry $d[i][j]$ represents the distance between nodes $i$ and $j$. The question asks whether there exists a weighted tree with $n$ nodes such that the distance along the tree between any two nodes exactly matches the corresponding…
三 (san/mit-tsu): three. JLPT N5 kanji.
Complete list of all 103 JLPT N5 kanji with stroke count, on-yomi, kun-yomi, meaning, and example words.
HSK 4 | verb | to raise something to a higher level or quality
HSK 4 | preposition / noun | using something as a foundation or source
HSK 3 | verb | to make something smaller in amount or number
HSK 5 | noun | regular, predictable pattern or law governing phenomena
The complete sound change history from Primitive Elvish through Common Telerin and Old Sindarin to Classical Sindarin — explaining WHY mutations exist and how the vowel system developed.
HSK 5 | noun | an unfair preconceived opinion not based on reason or experience
Regular and irregular comparative and superlative adjectives, formation of comparative and superlative adverbs, and ablative of comparison vs. quam.
HSK 5 | verb/noun/adjective | to put in effort or resources; input; deeply absorbed
HSK 5 | noun | code; source code; programming code
Master reference for all Sindarin verb conjugation: all 12 verb classes, all tenses/moods, all 9 persons — with full tables for model verbs and notes on scholarly disagreements.
HSK 2 | adverb | again (future repetition), then, one more time
Learn the systematic ki- (question), ti- (demonstrative), and i- (indefinite) correlative series in Esperanto.
Learn 〜のもとで and 〜のもとに to express acting under conditions, authority, supervision, or established premises.
北 (ホク/きた): north. JLPT N5 essential kanji.
HSK 5 | noun/adjective | the relationship between living organisms and their environment
HSK 4 | verb | to clearly express or demonstrate something
HSK 2 | verb/adjective | to get angry, to be angry
HSK 3 | verb | to stay, to remain; to leave behind, to keep; to leave a message
HSK 5 | verb / noun | to comment or critique; a commentary or review
HSK 1 | adjective / preposition | correct, right; directed at, towards
HSK 5 | noun | a biological preparation used to provide immunity against a disease
HSK 6 | verb | to express or articulate ideas clearly and systematically
HSK 3 | noun | salt, the common cooking mineral
HSK 3 | adverb | indicates that something happens before a specific event or time
HSK 5 | conjunction | even if, even though, no matter (strong concession)
HSK 3 | adjective | remaining rational and unruffled in difficult situations
HSK 1 | noun | book
六 (roku/mut-tsu): six. JLPT N5 kanji.
HSK 4 | noun | method, way, manner, mode
HSK 1 | pronoun | third-person singular pronoun for non-human things
HSK 3 | noun | belly, stomach, abdomen (colloquial)
HSK 5 | verb/noun | to manage, administer, or oversee; management
HSK 3 | grammar pattern | describes how well or intensely an action is performed
HSK 4 | verb | to take advantage of something for a purpose