expression
without doing; not doing
Formal or written equivalent of しないで. It commonly follows a する-verb noun, as in 確認せずに, or appears as 何もせずに, meaning that the action is not done before or while something else happens.
See also: せずに
確認せずに送信してしまった。
I sent it without checking.
彼は返事もせず、黙って出て行った。
He left silently without even replying.
休日は何もせずに過ごした。
I spent the day off doing nothing.