なくては

(-)なくては【(-)無くては】

●この業界は強引さがなくては生き残れない. In this business, you can't survive unless you're aggressive.

・君でなくてはこの仕事は務まらない. You're the only one who can handle this job.

・あなたがいなくては生きていけません. I can't live without you.

・もう少し調べてみなくてはわからない. I can't say [tell] until I've done a little more checking.

・人生の意味を考え直させられる. 演劇とはこうでなくては(ならない). We are made to rethink the meaning of life. This is what the drama is supposed to do [how drama is supposed to be, how a play should be].