咝 sī hiss Origin Definitions Defs Strokes Stroke Words Sentences Sents 咝咝 sīsī hissing sound an onomatopoeic word used to describe the continuous sharp sound of gas or steam escaping under pressure.咝咝声 sīsīshēng hiss hissing sound Sources Frequency data MTSU Chinese text computingSUBTLEX-CH