不変(ふへん)

ふへん
noun / adjective (no)
unchanging; immutable; constant
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:

  • 不変(ふへん)の真理(しんり) (unchanging truth)
  • 不変(ふへん)の法則(ほうそく) (immutable law)
  • 不変(ふへん)の価値(かち) (unchanging value)
  • 永遠(えいえん)不変(ふへん) (eternally unchanging)

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.

general
Added 2026.3.7 19:05
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