whistle
US /ˈwɪs.əl/
UK /ˈwɪs.əl/

1.
silbido, silbato
a clear, high-pitched sound made by forcing breath through a small hole between partly closed lips, or through a device that produces such a sound
:
•
He let out a loud whistle to get their attention.
Soltó un fuerte silbido para llamar su atención.
•
The referee blew his whistle to signal the end of the game.
El árbitro hizo sonar su silbato para señalar el final del partido.
1.
silbar
to make a clear, high-pitched sound by forcing breath through a small hole between partly closed lips, or through a device that produces such a sound
:
•
He began to whistle a cheerful tune as he walked.
Empezó a silbar una melodía alegre mientras caminaba.
•
The train whistled as it approached the station.
El tren silbó al acercarse a la estación.