Meaning of ではないか in Japanese

It seems that your search contains the following:

Definition of ではないか

じゃないか(janaika) · ではないか(dehanaika) · ちゃうか(chauka)

しないのではないか(shinainodehanaika) · ないのではないか(nainodehanaika)

(exp) I think (something) won't (something); probably (something) isn't (something)

I think that it likely that there was a major fault in the lookout.

"But you just come here in the summer!" Said Tony.

この論議ろんぎはやめようやめるではないか。

Let's put a stop to this discussion.

I have not heard from you. I was wondering if maybe my mail never got to you.

おれの言うとおりではないか。

Am I not right?

えりこは食事しょくじもとらずに長い間ながいあいだ、一生懸命いっしょうけんめい働いたので、倒れるたおれるのではないかと思った。

Eriko worked so long and so hard, without stopping to eat, that I feared she would faint.

I suspect they water down the beer in that pub.

I was scared that you might leave me.

あなたが失敗しっぱいしたするのではないかと心配しんぱいしたする。

I was afraid that you had failed.

It may be unwise of you to advertise your presence.