啸 Strokes Write it Listen 啸 xiào to roar, to howl; to scream; to whistle HSK 7–9 11 strokes Radical 口 Sound + meaning 1 word Built from口meaningkǒumouth; entrance, gate, opening肃soundsùto pay respects; solemn, reverent How it works口 hints at the meaning (mouth), and 肃 sù hints at the sound.