verb · to cover with the hand or enclose (such as eyes, nose, or ears)

她害羞地用手捂住了脸。

verb · to cover up or keep secret, such as an affair or mistake

这种事是捂不住的，真相早晚会大白。

verb · to be contrary to or in opposition

妈妈用手捂着嘴，惊讶地叫出声来。