after vs ex-

after

adj
  • At or towards the stern of a ship. 

adv
  • Behind; later in time; following. 

conj
  • Signifies that the action of the clause it starts takes place before the action of the other clause. 

prep
  • In pursuit of, seeking. 

  • In allusion to, in imitation of; following or referencing. 

  • In spite of. 

  • Behind. 

  • Next in importance or rank. 

  • Denoting the aim or object; concerning; in relation to. 

  • Subsequently to; following in time; later than. 

  • Used to indicate recent completion of an activity 

  • As a result of. 

ex-

prefix
  • former, but still living (almost always used with a hyphen) 

  • out of 

  • outside 

  • Lacking. 

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