expression
is it not so?; isn't it?
A formal, somewhat literary rhetorical question used to express a conjecture or to seek agreement. Equivalent to ではないだろうか.
この計画には問題があるのではなかろうか。
Isn't there a problem with this plan?
彼の言うことも一理あるのではなかろうか。
Isn't there some truth in what he says?