固唾 かたず
katazuo nomu

Godan Verb (mu)
Idiomatic Expression

1. to hold one's breath (in fear, anxiety, etc.)

わたくし興奮 こうふんして固唾 かたずをのんだ。
watashiwa kōfun shite katazuo nonda
I held my breath in excitement.
Other forms: