The bird's trill filled the morning air.
A series of rapid, alternating sounds or notes, often used in music.
She can trill her voice beautifully when she sings.
To produce a series of rapid, alternating sounds or notes.
The trill of the frog was heard near the pond.
A rapid vibration or fluttering sound, often made by certain animals.
Tehokas ilmainen kuvastosanakirja ja välähdykortit.
