to make (someone) drink; to force to drink; to let drink
to serve (alcohol); to treat someone (to drinks)
to be drinkable (esp. of alcohol); to be palatable
赤ちゃんにミルクを飲ました。
I fed the baby milk.
看護師が患者に薬を飲ましている。
The nurse is giving the patient medicine.
子供に苦い薬を飲ますのは毎回一苦労だ。
Getting a child to take bitter medicine is a struggle every time.