不可逆

Chinese
not; no reversible
simp. and trad.
(不可逆)		 不 可逆

Pronunciation

Adjective

不可逆

  1. irreversible

Japanese
Kanji in this term
不 可 逆
ふ
Grade: 4		 か
Grade: 5		 ぎゃく
Grade: 5
on’yomi

Etymology

Compound of 不 (fu-, “un-, in-, not”) +‎ 可逆 (kagyaku, “reversibility”).[1]

Pronunciation

Noun

不可逆 (hiragana ふかぎゃく, rōmaji fukagyaku)

  1. irreversibility
  2. (information theory) lossiness

Usage notes

In compounds, this term is often treated like an adjective:

不 (ふ)可 (か)逆 (ぎゃく)反 (はん)応 (のう)
fukagyaku hannō
an irreversible (chemical) reaction
不 (ふ)可 (か)逆 (ぎゃく)圧 (あっ)縮 (しゅく)
fukagyaku asshuku
lossy compression

However, for use as a standalone adjective, the full adjective form of 不 (ふ)可 (か)逆 (ぎゃく)的 (てき) (fukagyakuteki) is generally required.

Antonyms

Derived terms
Derived terms
  • 不可逆的 (ふかぎゃくてき) (fukagyakuteki): irreversible
  • 不可逆電池 (ふかぎゃくでんち) (fukagyaku denchi): an irreversible battery
  • 不可逆反応 (ふかぎゃくはんのう) (fukagyaku hannō): (chemistry) an irreversible reaction

References
  1. 2006, 大辞林 (Daijirin), Third Edition (in Japanese), Tōkyō: Sanseidō, →ISBN
  • 1988, 国語大辞典（新装版） (Kokugo Dai Jiten, Revised Edition) (in Japanese), Tōkyō: Shogakukan
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