Read Edit View history 不宣而战 bùxuān'érzhàn attack unannounced Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 不宣而战/不宣而戰 · bùxuān'érzhàn · attack unannounced 2026/03/04 不宣而战 / 不宣而戰 bùxuān'érzhàn attack unannounced open hostilities or start a war without a formal declaration 敌人不宣而战，对边境发起了突然袭击。 idiom created sense Mar 4, 2026, 02:25 AM