an act of speaking or writing which has an action as its aim, but which does not itself perform that action, for example persuading or convincing 以言成事,言后行为(指言语的目的是达成行为,但本身并不执行这个动作,如劝导或说服) Word Origin1950s: from modern Latin perlocutio(n-), from per- ‘throughout’ + locutio(n-) ‘speaking’.