さなくば

expression, conjunction

if not; otherwise; or else

Dated conjunction used to present an alternative or consequence when a condition is not met. In modern Japanese, そうでなければ or さもないと are more common.

• 早はやく行いけ、さなくば遅おくれるぞ。

  Hurry up, or else you'll be late.

• さなくば、この計けい画かくは失しっ敗ぱいに終おわるだろう。

  Otherwise, this plan will likely end in failure.