필요가 · 필요를
need, necessity
Example
시간이 많으니까 걱정할 필요가 없어요.
There's plenty of time, so there's no need to worry.
Word parts
필 must+요 need
Literally 'must-need' — something you can't do without.
Good to know
-(으)ㄹ 필요가 없다 = there's no need to: 올 필요가 없어요. Pronounced [피료].