
Trill
Vocal Expertise
The verb 'trill' often indicates a singer's skill to rapidly shift pitch.

The opera singer was able to trill effortlessly.
Birdsong Description
'Trill' commonly describes bird sounds, suggesting a pleasant and natural quality.

Awakening in the forest, I listened to the birds trill.
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FlutterQuaverShakeShiverTrembleVibrateWarble
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