interjection
Colloquial contraction of 無ければ, used in casual speech to mean 'if there isn't/aren't' or 'if one doesn't'. Often appears at the end of a sentence as a kind of interjection-like conditional.
See also: 無ければ
お金が無けりゃ、何も買えないよ。
If you don't have money, you can't buy anything.
急がなけりゃ、遅れるぞ。
If we don't hurry, we'll be late.