名詞 drinkable:

1. any liquid suitable for drinking
   同義詞：beverage, drink, potable

形容詞 drinkable:

1. suitable for drinking
   同義詞：potable

1. Sea-water can be made drinkable by distilling out the salt.
   可以用蒸餾法除去海水中的鹽分以制取飲用水。
2. Is this water drinkable?
   這水可以喝嗎?

drink.a.ble

adj.（形容詞）
Suitable or fit for drinking; potable:
適于飲用的；可飲用的：
例句：
drinkable water.
可飲水

n.（名詞）
A beverage.
飲料

【引伸】
drink.abil.ity
n.（名詞）