雷打不动 léidǎbùdòng unshakable Origin Definitions Defs Strokes Stroke Words Sentences Sents 雷 léi noun thunder thunder; the loud noise caused by atmospheric electrical discharge打 dǎ verb to hit to strike; to knock; to beat; to break不动 不動 budong particle [inability] Used after a verb to indicate an inability to move, alter, or affect the object by the action of that verb.