飲まなきゃ

have to drink, must drink

→ 飲む
飲ま drink + なきゃ Necessitative (must)
verb · necessitative Rare #36,211
have to drink, must drink Informal contraction of 飲まなければならない or 飲まなくてはいけない.
JA: 薬を飲まなきゃ。
EN: I have to take my medicine.
Conjugation of 飲む

飲まなきゃだめですよ鼻血失った血を補給するため

You have to drink it to replenish the blood you lost from the nosebleed.

— サスペリア (1977)

お薬飲まなきゃ

I have to take my medicine.

— ソング・オブ・ザ・シー 海のうた (2014)

あんなに飲まなきゃよかった

I shouldn't have drunk so much.

ゆっくり飲まなきゃ

I have to drink slowly.

— 8 1/2 (1963)

あんなにワイン飲まなきゃよかった

I shouldn't have drunk so much wine.