Grammar › N3 · 13 Particles and endings, more
〜ず(に): without doing
N3 · 13 Particles and endings, more
Written negative: not doing, without doing.
Verb negative stem + ず(に). する→せず. Often 〜ずに = 〜ないで. Formal and written, but common in speech with 食べずに etc.
Examples
傘を持たずに出かけた。
I went out without taking an umbrella.
何も言わず、彼は帰った。
Saying nothing, he went home.