Where does “不可逆” come from?

不可逆 (Japanese) comes from Japanese 可逆, from Japanese 逆, from Middle Chinese 逆.

不可逆 (Japanese): irreversibility; lossiness

Definitions

  1. irreversibility; lossiness

Ancestry of “不可逆”, step by step

不可逆 traces back through two separate lines of ancestry.

via Japanese 可逆

StepLanguageWordMeaning
1Japanese可逆reversibility; invertibility; lossless
2Japanese逆reverse; contrary; opposite; converse
3Middle Chinese逆—

via Japanese 不

StepLanguageWordMeaning
1Japanese不un-, non-, in-; bad, poor
2Middle Chinese不—
Every word from Middle Chinese 逆 →Every word from Japanese 逆 →Every word from Japanese 可逆 →