1. (verb) sing or play with trills, alternating with the half note above or below

• quaver
• trill

2. (verb) sing by changing register; sing by yodeling

• descant
• yodel

1. (noun) a lumpy abscess under the hide of domestic mammals caused by larvae of a botfly or warble fly

• animal disease

2. (verb) sing or play with trills, alternating with the half note above or below

• sing

3. (verb) sing by changing register; sing by yodeling

• sing

1. (verb) sing or play with trills, alternating with the half note above or below

• eighth note
• quaver
• shake
• trill
• warbler

2. (verb) sing by changing register; sing by yodeling

• descant
• discant
• yodel
• yodeling
• yodeller