whistle

/ˈwɪsəl/

make whistling sounds

中文释义：吹口哨；鸣笛

The referee blew his whistle to signal the end of the match.

裁判吹哨示意比赛结束。

He whistled a cheerful tune while walking down the street.

他沿着街道走时，吹着欢快的口哨。