〜ないで naide
〜ないで（naide）means “without doing; instead of doing”. Attaches to the plain negative (ない form) of a verb to mean doing the main action 'without' first doing this one, or doing B 'instead of' A. Formation: V-ない + で（する→しないで、たべる→たべないで、のむ→のまないで）
without doing; instead of doing
N5Formation
V-ない + で（する→しないで、たべる→たべないで、のむ→のまないで）
Explanation
Attaches to the plain negative (ない form) of a verb to mean doing the main action 'without' first doing this one, or doing B 'instead of' A. It describes the manner or accompanying state of an action, not a request.
Examples
Note
Compare 〜なくて, which is used for cause/reason or listing states; 〜ないで is for accompanying manner.
FAQ
〜ないで — what does it mean and how is it used?
without doing; instead of doing. Attaches to the plain negative (ない form) of a verb to mean doing the main action 'without' first doing this one, or doing B 'instead of' A. It describes the manner or accompanying state of an action, not a request.
〜ないで — how do you form it?
V-ない + で（する→しないで、たべる→たべないで、のむ→のまないで）
〜ないで — any usage notes?
Compare 〜なくて, which is used for cause/reason or listing states; 〜ないで is for accompanying manner.