Miànduì tā de zhǐzé, tā zhǐshì wúyán de dīxià le tóu.
Faced with her accusations, he silently bowed his head.
Tips
usage
无言 often implies being rendered speechless by emotion — grief, shock, or having no valid counter-argument. The fuller idiom 无言以对 (wúyán yǐ duì) means 'have nothing to say in response' and is very common.