HSK10+
xì
breathe
Phonosemantic compound. 口 represents the meaning and 四 represents the sound.
口 Meaning component
kǒu
mouth
四 Sound Iconic component
sì
four
Depicts breathing through the nose.
Seal script
Regular script
呬
to rest; to breathe; to gasp
Academia Sinica
Unicode
CC-CEDICT
MTSU Chinese text computing
季旭昇《說文新證》p.948
漢語多功能字庫