a-







a-


2

prefix meaning “not,” from Latin a-, short for ab “away from” (e.g. avert), or its cognate, Greek a-, short for apo “away from, from,” both cognate with Sanskrit apa “away from,” Gothic af, Old English of (see apo-).

3

prefix meaning “not,” from Greek a-, an- “not,” from PIE root *ne “not” (see un-).

pref.

  1. Without; not:acellular.

  1. A prefix meaning “without” or “not” when forming an adjective (such as amorphous, without form, or atypical, not typical), and “absence of” when forming a noun (such as arrhythmia, absence of rhythm). Before a vowel or h it becomes an- (as in anhydrous, anoxia).

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