なきゃならない

Meanings

1

cannot do without; indispensable; absolutely necessary

usually written using kana alone

Expresses that something is essential or that one cannot manage without it. Equivalent to 無くてはならない.

See also: なくてはならない

この仕し事ごとには経けい験けんがなきゃならない。
Experience is indispensable for this job.

2

have to do; must do

Attaches to the negative stem of a verb (～なきゃならない) to express obligation. Colloquial contraction of ～なくてはならない.

See also: なくてはならない

明日あしたまでにレポートを出ださなきゃならない。
I have to submit the report by tomorrow.