HSK C7-9
Correct

啸

/ xiào /
Strokes

Definition

to hiss/to whistle

Example

As a Verb
(of humans) whistle; scream
As a Verb
(of some birds or animals) cry; howl; roar
As a Verb
(of the wind, the sea, etc) howl; roar
As a Verb
(of a bullet, plane, etc) whirr; whiz; whistle