enough

(noun) an adequate quantity; a quantity that is large enough to achieve a purpose. Synonyms: sufficiency. Examples: "Enough is as good as a feast." "There is more than a sufficiency of lawyers in this country."

(adj) sufficient for the purpose. Synonyms: adequate, decent. Examples: "An adequate income." "The food was adequate." "A decent wage." "Enough food." "Food enough."

(adv) as much as necessary. Synonyms: plenty. Examples: "Have i eaten enough?"; (`plenty' is nonstandard) "i've had plenty, thanks."