呜 Strokes Write it Listen 呜 wū the sound of someone crying or sobbing HSK 7–9 7 strokes Radical 口 Sound + meaning 1 word Built from口meaningkǒumouth; entrance, gate, opening乌soundwūcrow, rook, raven; black, dark How it works口 hints at the meaning (mouth), and 乌 wū hints at the sound.