godan verb (-su), transitive verb
stop drinking; leave a drink unfinished
Used when someone stops drinking before finishing a beverage, leaving some remaining. Often implies the drink is left half-finished.
彼はコーヒーを飲み止して席を立った。
He left his coffee unfinished and stood up.
お酒を飲み止すのはもったいない。
It's a waste to leave your drink unfinished.