不可逆

不可逆

Chinese

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

Pronunciation

• Mandarin

  (Pinyin): bùkěnì

  (Zhuyin): ㄅㄨˋ ㄎㄜˇ ㄋㄧˋ

• Cantonese (Jyutping): bat¹ ho² jik⁶

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• Mandarin
  • (Standard Chinese)⁺
    • Pinyin: bùkěnì
    • Zhuyin: ㄅㄨˋ ㄎㄜˇ ㄋㄧˋ
    • Gwoyeu Romatzyh: bukeenih
    • IPA ^(key): /pu⁵¹ kʰɤ²¹⁴⁻²¹¹ ni⁵¹/
• Cantonese
  • (Standard Cantonese, Guangzhou)⁺
    • Jyutping: bat¹ ho² jik⁶
    • Yale: bāt hó yihk
    • Cantonese Pinyin: bat⁷ ho² jik⁹
    • Guangdong Romanization: bed¹ ho² yig⁶
    • IPA ^(key): /pɐt̚⁵ hɔː³⁵ jɪk̚²/

Adjective

不可逆

1. irreversible

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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

• On’yomi: Goon
  • (Tokyo) ふか​ぎゃく [fùkáꜜgyàkù] (Nakadaka – [2])[1]
  • IPA^(key): [ɸɯ̟ᵝka̠ɡʲa̠kɯ̟ᵝ]

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

• 可 (か)逆 (ぎゃく) (kagyaku): reversibility

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