adjective
equal to what is needed
adverb
always used after an adjective, adverb, or verb
in the amount needed :to the necessary degree
to a degree that is not very high or very low :to a reasonable extent
fair enough
sure enough
pronoun
[noncount] :an amount that provides what is needed or wanted :an amount that is enough
enough is enough
used to say that you want something to stop because you can no longer accept or deal with it
enough said
informal - used in speech to say that you understand what someone is telling you and no further information is needed