accelerando
adv, adj, n (pl -dos or -di) (music 音) with gradually increasing speed 漸快(的). accelerando, n (pl ~s) piece of music (to be) played in this way (演奏)漸快的音樂. Cf 參看 rallentando.
??? 情景例句
When my grandpa is in a bad mood, he's grouchy with everyone.