なかろう

expression

probably not; I think not

Presumptive form of ない, expressing a conjecture that something is not the case. Often used in formal or written contexts.

• 明日あしたは雨あめは降ふるまい。降ふったとしても大たいしたことはなかろう。

  It probably won't rain tomorrow. Even if it does, it won't be much.

• この問もん題だいは彼かれには難むずかしくなかろう。

  This problem probably isn't difficult for him.