expression, i-adjective
unnecessary; not needed; not necessary
Straightforward negative of 必要; used in everyday speech and writing.
今すぐ返事は必要ない。
An immediate reply is not necessary.
この書類はもう必要ないので捨ててください。
These documents are no longer needed, so please throw them away.
Compound of 必要 (necessary) + ない (not).