quaver
verb [intransitive, transitive]- (+ speech)
if somebody’s voice quavers, it is unsteady, usually because the person is nervous or afraid （嗓音因紧张或害怕等）颤抖，颤动 Oxford Collocations DictionaryQuaver is used with these nouns as the subject:- voice
Word Originlate Middle English (as a verb in the general sense ‘tremble’): from dialect quave ‘quake, tremble’, probably from an Old English word related to quake. The noun is first recorded (mid 16th cent.) as a musical term.
