a:- a

a ¦ (before a vowel an, exc. a-fRin), a prefix corresponding to Gk. ἀ, ἀν, Lat. in, Goth. and Germ. un, Eng. in or un, and having a negative or privative or contrary sense (an-eka not one; an-anta endless; a-sat not good; a-paSyat not seeing)