an-1

1.
a prefix occurring before stems beginning with a vowel or h in loanwords from Greek, where it means “not,” “without,” “lacking” (anarchy; anecdote); used in the formation of compound words:
anelectric.
Also, before a consonant, a-.
Origin
< Greek. See a-6, in-3, un-1

an-2

1.
variant of ad- before n: announce.

an-3

1.
variant of ana- before a vowel:
anion.
British Dictionary definitions for an-

a-1

prefix
1.
not; without; opposite to: atonal, asocial
Word Origin
from Greek a-, an- not, without

an-

prefix
1.
not; without: anaphrodisiac
Word Origin
from Greek

ana-

prefix
1.
up; upwards: anadromous
2.
again: anagram
3.
back; backwards: anatropous
Word Origin
from Greek ana
Word Origin and History for an-

privative prefix, from Greek an-, "not, without," related to ne- and cognate with Sanskrit an-, Latin in-, Gothic and Old English un- (see un- (1)).

form of Latin ad- before -n- (see ad-).

an- in Medicine

an- pref.
Variant of a-.