12345678Keywordonomatopoetica hissing soundFrequency#4818Strokes8ReadingssīMnemonic口 (mouth) gives the meaning and 丝 the sound.Stroke orderComposed of口mouth丝silkUsed in vocabulary咝sī(onom.) to hiss; to whistle; to whiz; to fizz咝咝声sīsīshēnghissing sound (onom.)