The recognition of the word "Enough"

Question

I came across a sentence and had bugged me ever since. I cannot identify whether the word "Enough" is an adjective, a pronoun, a determiner or an adverb although I highly suspect that is an adjective since it comes after a linking verb and describes the noun; so here it is:

Even the small amount she had taken was enough to warm her throat as it slid down.

Answer 1

It is an adjective modifying amount. It is a quantifier.

It is easier to see here:

"One drink is enough to make me drunk."

or

"There is enough money to buy the book."