Dictionary
un
Pronunciation: (un), [key]—
pron. Dial.
one:
young uns; He's a bad un. Also,'un.un-
a prefix meaning “not,” freely used as an English formative, giving negative or opposite force in adjectives and their derivative adverbs and nouns (
unfair; unfairly; unfairness; unfelt; unseen; unfitting; unformed; unheard-of; un-get-at-able), and less freely used in certain other nouns (
unrest; unemployment).
un-
a prefix freely used in English to form verbs expressing a reversal of some action or state, or removal, deprivation, release, etc. (
unbend; uncork; unfasten; etc.), or to intensify the force of a verb already having such a meaning (
unloose).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.