Expressions· 20 今こん 是ぜ 昨さく 非ひ complete reversal of values or thinking over time; realizing and regretting past errors 是ぜ か 非ひ か right or wrong; whether it is right or wrong 非ひ がある be at fault; be to blame; be in the wrong Show 4 more Show fewer 非ひ を 悟さと る realize one's error; see the error of one's ways 非ひ を 諭さと す rebuke someone for their faults 是ぜ が 非ひ でも by any means; at all costs; no matter what 是ぜ 非ひ もない unavoidable; inevitable; there's no help for it See all 20 in Explore →
Related words· 7 過ち is a concrete mistake or wrongdoing someone commits, while 非 is the more abstract quality of being at fault, as in 非を認める .
非 is a native Sino-Japanese negation prefix used in formal contexts, while ノット is a modern English loan-prefix with a casual or technical feel.
非 negates by marking deviation from a norm (非現実的 ), whereas 無 simply denotes absence or lack, sometimes with a pejorative nuance (無愛想 ).
非 forms words meaning 'non-' or 'anti-' with a stronger sense of opposition, whereas 未 focuses on something not yet having occurred or being unfinished.
Show 3 more Show fewer 非 is a prefix meaning 'non-' or 'un-' that simply negates or denies a quality (非公式 ), while 反 implies actively opposing or countering something (反対 , 反発 ).
非 negates by classifying something as outside a category or opposed to it (非公式 ), whereas 不 is a more general, straightforward negation (不安 ).
非 prefixes a word to mean 'non-' or 'un-', simply negating a state, whereas 排 implies actively rejecting or expelling something.
Opposites 是 refers to what is right or justified, while 非 marks what is wrong or blameworthy, as paired in the compound 是非 (right and wrong).
非 negates a state entirely ('non-/un-'), while 脱 indicates escaping or moving beyond a state, so they express different kinds of opposition to a base word.
Don't confuse with· 5 不 is the everyday negative prefix used with ordinary adjectives like 不便 and 不安 , while 非 is a stiffer, more formal prefix as in 非公式 and 非常識 .
無 negates by showing total absence, as in 無関係 , whereas 非 negates category membership or propriety, as in 非公開 .
未 means 'not yet' in a temporal sense, as in 未完成 , while 非 carries no time meaning and instead marks something as outside a category, as in 非公式 .
Show 2 more Show fewer 否 (ひ ) is a noun meaning 'no/a negative answer', while 非 (ひ ) is a prefix/noun meaning 'wrong, fault, or not-' and the two are easily mixed up because they share the reading ひ .
非 and 被 share the reading ひ but 非 is a negation prefix meaning 'non-/un-' (非常識 ), while 被 marks the recipient of an action (被害者 ).
Word family· 298 emergency; state of emergency · extreme; extraordinary; severe; remarkable; very
certainly; without fail; by all means · right and wrong; pros and cons
criticism; blame; censure
private; non-public; closed
informal; unofficial
Show 25 more Show fewer lack of common sense; senselessness; absurdity
part-time work; non-regular employment
unjust; inhuman; outrageous
cold-hearted; callous; unfeeling; cruel · insentient; inanimate
emergency; time of emergency
illegal; unlawful
not for sale; free item; promotional item
asymmetry; lack of symmetry
non-nuclear; anti-nuclear
delinquency; misconduct
tax-exempt; tax-free
powerless; helpless; incompetent
extraordinary; remarkable; uncommon
asynchronous
unpatriotic person; traitor
illogicality; irrationality
nonlinear; non-linear
off duty; not on duty
impoliteness; rudeness; discourtesy
non-ferrous
unnatural death; untimely death
non-destructive
unreasonable; illogical
very; extremely; exceedingly
nonmetal
See all 298 in Explore →
Etymology A Sino-Japanese morpheme read ひ and written 非 , conventionally associated with negation, wrongness, and 'non-' meanings. No detailed historical derivation is asserted here.
Report an issue with this page
Copyright © 2026 Kotomora. All Rights Reserved.