不

Law

forbearance; omission; nonfeasance; inaction

non-inflammables; incombustible (usu. waste)

Mathematics

invariance

inequality; disparity

unwise plan; bad policy; inexpediency

Mathematics

less-than sign or greater-than sign (< or >); inequality sign

distrust; discredit

imperturbability; steadfastness

Martial arts

cool head in an emergency; keeping one's calm (e.g. during a fight)

non-support; disapproval (e.g. in an opinion poll)

unsinkable battleship

irregularity; unevenness; asymmetry; lack of uniformity

dissonance; discord

pending; unsettled; undecided

Buddhism

strict observance of the commandment that all priests should be celibate

improper; inappropriate; illegitimate; unacceptable; unfair

bad reputation; poor reception; unpopularity; disrepute

small attendance; poor house

Noun or verb acting prenominally

unprofitability

bad manners; rudeness

not carrying (driver's license, passport, etc.); not having on one's person; nonpossession

fasting

determination

impartiality; neutrality; fairness

Nouns which may take the genitive case particle 'no'

unwritten

Nouns which may take the genitive case particle 'no'

illiterate; uneducated

Common noun

poor writing