"The eagle drinks water."
Translation:Ο αετός πίνει νερό.
ποτά is a noun -- "drinks, beverages" in the sense of "would you like some drinks?" or "alcoholic drinks are bad for you". Plural of ποτό. I don't think there's a noun form ποτάω that this could be the "he, she, it" form of.
Also, αετός by itself is not a good translation of "the eagle".