I. a- 1 /ə/ BrE AmE prefix
1 . in a particular condition or way:
aloud
alive (=living)
with nerves all a-tingle (=tingling)
2 . old use in, to, at, or on something:
abed (=in bed)
afar (=far away)
II. a- 2 /eɪ, æ, ə/ BrE AmE prefix
not or without:
amoral (=not moral)
atypically (=not typically)