un-

I

aff. 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)

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Etymology: ME un-, on-, OE; c. D on-, G un-; akin to L in-, Gk an-, a-. See a-, an-, in- II

un-

aff. 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)

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Etymology: ME, OE un-, on-; c. D ont-=, G ent-; akin to L ante, Gk anti; cf. ante-, anti-