quaverer

intransitive verb

1. to shake or tremble
2. to be tremulous: said of the voice
3. Music to make a trill or trills in singing or playing

Origin: ME quaveren, freq. of Early ME cwafien, to shake, tremble < OE *cwafian, prob. < IE base *gwēbh-, wobbly, flabby, tadpole > Ger quappe & Du kwabbe, tadpole

transitive verb

1. to utter in a tremulous voice
2. Music to sing or play with a trill or trills

noun

1. a tremulous quality in a voice or tone
2. Brit. eighth note