振臂一呼 zhènbìyīhū to issue a call for action Origin Definitions Defs Strokes Stroke Words Sentences Sents 振臂 zhènbì to raise one's arm to wave or raise one's arm, often to express strong emotion or to rally others一 yī adverbnumeral [suddenness] Used before a verb to indicate that an action or situation occurs suddenly or unexpectedly.呼 hū verb to shout To cry out; to shout or yell loudly