不可逆変化 ふかぎゃくへんか Meanings Noun irreversible change See also: 可逆変化 (かぎゃくへんか). Kanji 不 un-. Read as フ. 可 possible 逆 reverse. Read as ギャク. 変 change. Read as ヘン. 化 transform. Read as カ. Jinuma: Japanese Dictionary · Word lists