無

no penalty; no punishment; acquittal; impunity

After the -te form of a verb

not long has passed since ...

coward; gutless person; sissy; weakling; loser; milquetoast; good-for-nothing

not non-existent; not completely lacking; there is some; certainly existent

useless; worthless; silly; trivial

useless; in vain

desperately; recklessly; (rushing) headlong

let's not say (such things) to each other

with no hard feelings

Colloquial

nothing special; no big deal; doesn't matter; nothing to worry about

(there is) no sign (of); leaving no trace; nowhere to be seen

Noun or verb acting prenominally

ordinary; nothing special; nothing to exclaim over

Pre-noun adjectival (rentaishi)

insatiable; untiring; persistent

not a moment to waste; there is no time to lose; cannot wait any longer

being good-for-nothing; useless person

absence from work without permission

ending without incident; being successfully brought to completion; finishing something without a hitch

Conjunction

in the event that it did not (or does not) exist; without

shameless; brazen and unscrupulous

Pre-noun adjectival (rentaishi)

nameless; anonymous; without name

Slang

impossibly hard video game

being the strongest; being powerful (mighty) without equal

unthinking; thoughtless; heedless; inconsiderate

tasteless and odorless; bland