noun:

• unreasonable idea; illogical plan
• illogical move (in shogi or go) - orig. meaning

noun / adjectival noun / ~の noun:

• as fierce and nimble as any; daring and agile without equal - four character idiom

noun:

• voiceless sound

noun / adjectival noun:

• cold-hearted; callous; pitiless; unsympathetic - four character idiom

noun:

• (the principle of) nonresistance

noun:

• naked trust

expression:

• obviously; as we all know; needless to say; of course; it goes without saying

expression:

• have to (verb); must (verb) - after negative base of verb ➜ ないと行けない【ないといけない】
• is indispensable; absolutely necessary - esp. 無いといけません ➜ ないと行けない【ないといけない】

expression / godan ~る verb:

• to come to nothing; to be in vain; to lead nowhere

expression / godan ~る verb:

• to think hard about (something that one doesn't know much of); to rack one's brain

noun:

• there being no use in arguing (about it); being stone-deaf to someone's appeals - four character idiom

expression / adjective:

• vulgar; crude; tacky ➜ 品のいい

expression:

• the most; the best; peerless; the greatest; first-rate

noun:

• political independents

adjective:

• feeble

interjection:

• unless one ...; if one does not ... - colloquialism ➜ 無ければ

noun:

• wireless system - IT term

noun / ~の noun:

• urban villain; street hoodlum - four character idiom

noun:

• moonless sky (poetic usage)

noun:

• painless childbirth; painless delivery
• obstetric analgesia for labor (e.g. epidural)

noun:

• inner-thigh-propping twist down - Sumo term

expression / godan ~う verb:

• to ask a big favour; to ask unreasonable things; to be unreasonable

expression / adjective:

• unlucky ➜ 運がいい【うんがいい】

noun:

• infinite decimals

noun:

• caecilian (any burrowing legless amphibian of the order Gymnophiona)