-berenderedspeechless;bedumbfounded;beleftwithoutanargument;beputdown;bereducedtosilence;bestruckdumb;bestumped;(He)closed(his)mouthandhadnothingtosay.;havenothingtosayforoneself;inarticulate;keepmuteasamaggot;keepsilent;puttosilence;shutupwhendefeatedinanargument;strikedumb;Thereisnothingmoreonecansay.;tongue-tied:
Hisforcefulargumentssilencedhisopponent.他论辩有力，把对方说得哑口无言。