a- vs im-

a-

prefix
  • Not, without, opposite of. 

  • Towards; Used to indicate direction, reduction to, increase to, change into, or motion. 

  • Forming verbs with the sense away, up, on, out. 

  • Forming verbs with the sense of intensified action. 

  • In, on, at; used to show a state, condition, or manner. Also passing into sense 2. 

  • Away from. 

  • Of, from. 

  • Used as a prefix to verbs in the sense of remaining in the same condition. Actively doing something. 

  • In, into. Also passing into sense 5. 

  • A syllable added by a speaker supposed to be Italian, or used to mimic or mock Italian accents; a pseudo-Italian syllable. 

  • In the direction of, or toward. 

  • Forming words with the sense of wholly, or utterly out. 

  • Used to form the past participle of a verb. 

im-

prefix
  • Expressing negation; not. 

How often have the words a- and im- occurred in a corpus of books? (source: Google Ngram Viewer )