Definition of 無くても良い
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(exp) (after neg. stem of verb) need not (verb); (not) have to; expressing absence of obligation or necessity
わざわざ彼を訪ねて行かなくてもよい。
Don't bother to call on him. -
need not have; need not exist
あなたは明日、車がなくてもいいかしら。私、車が必要なの。
Can you do without the car tomorrow? I need it.