自告奋勇 zìgàofènyǒng to volunteer Origin Definitions Defs Strokes Stroke Words Sentences Sents 自 zì affixadverb self (bound form) self; oneself; one's own; refers to an action done by oneself or to oneself告奋勇 告奮勇 gàofènyǒng to volunteer to offer to do something of one's own accord, especially a difficult or challenging task