incapable of being retracted or revoked; cannot be undone or taken back

无法收回、不可撤销

词根记忆

ir-（否定前缀，表“不”）+ re-（重新，再）+ voc-（呼喊，召唤）+ -able（形容词后缀，表“可……的”）→ 不能被重新召唤回来的 → 不可撤销的、无法挽回的

纽约时报原文

He ponders the degree to which people might intentionally upset their lives before they find they’ve made some irrevocable mistake.

译文：他在思考，人们究竟会在多大程度上刻意打乱自己的生活，直到发现自己犯下了无法挽回的错误。

外刊常见搭配

irrevocable decision 不可挽回的决定

irrevocable agreement 不可撤销的协议

irrevocable commitment 不可撤销的承诺

例句

Her decision to quit her job was irrevocable; she had already turned down all other job offers and packed her things.

她辞职的决定是无法挽回的——她已经拒绝了所有其他工作机会，并且收拾好了东西。

In legal terms, a will becomes irrevocable once the testator passes away.

从法律角度来说，立遗嘱人去世后，遗嘱即具有不可撤销性。