不変(ふへん)

ふへん
noun, no-adjective
unchanging; immutable; constant
formaldescriptive
1. unchanging; immutable; constant
The state of remaining the same without change. Used for abstract concepts like truths, principles, and values that do not change over time. Composed of 不 (not) + 変 (change).
自然(しぜん)の法則(ほうそく)は不変(ふへん)だ。
The laws of nature are unchanging.
不変(ふへん)の真理(しんり)を追(お)い求(もと)める。
To pursue unchanging truth.
時代(じだい)が変(か)わっても、親(おや)が子(こ)を思(おも)う気持(きも)ちは不変(ふへん)である。
Even as the times change, a parent's feelings for their child remain constant.

Usage

Used as a noun (不変(ふへん)だ / 不変(ふへん)である) or as a の-adjective (不変(ふへん)の). Tends to appear in formal or literary contexts. Often paired with abstract nouns like 真理(しんり) (truth), 法則(ほうそく) (law), 価値(かち) (value).

Common collocations

Similar words

普遍(ふへん) (also read ふへん) means 'universal' — applying everywhere — while 不変(ふへん) means 'unchanging' — not changing over time. Despite the identical reading, they are different words with different kanji and meanings.

Related Words

Antonym: 変化(へんか) (change, transformation)
general
Added 2026.3.7 19:05 · Revised 2026.9.2 13:01
15500/15535_fuhen