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un-

Syllabification: un-

Definition of un- in English:

prefix

1(Added to adjectives, participles, and their derivatives) denoting the absence of a quality or state; not: unabashed unacademic unrepeatable
1.1The reverse of (usually with an implication of approval or disapproval, or with another special connotation): unselfish unprepossessing unworldly

Origin

Old English, of Germanic origin; from an Indo-European root shared by Latin in- and Greek a-.

Usage

The prefixes un- and non- both meanlacking’ or ‘not,’ but there is a distinction in terms of perspective. The prefix un- tends to be stronger and less neutral than non-. Consider, for example, the differences between unacademic and nonacademic, as in his language was refreshingly unacademic; a nonacademic life suits him.

Definition of un- in:

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