palpitate

1. V-I If someone's heart palpitates, it beats very fast in an irregular way, because they are frightened or anxious. 悸动

He felt suddenly faint, and his heart began to palpitate. 他突然感到晕厥，心脏也开始悸动。

2. V-I If something palpitates, it shakes or seems to shake. 抖动[文学性]

She lay on the bed, her eyes closed and her bosom palpitating. 她躺在床上，双目合拢，胸部颤抖。