enough

nouns

an adequate quantity; a quantity that is large enough to achieve a purpose
"enough is as good as a feast"; "there is more than a sufficiency of lawyers in this country"

adjectives

sufficient for the purpose
"an adequate income"; "the food was adequate"; "a decent wage"; "enough food"; "food enough"

adverbs

as much as necessary
"Have I eaten enough?"; (`plenty' is nonstandard) "I've had plenty, thanks"