\-ize\ [F. -iser, L. -izare, Gr. ?.]
A verb suffix signifying to make, to do, to practice; as
apologize, baptize, theorize, tyrannize.
Note: In the case of certain words the spelling with -ise
      (after analogy with F. -iser) is the usual form; as,
      catechise, criticise. With regard to most words,
      however, which have this suffix there is a diversity of
      usage, some authorities spelling -ise, others (as in
      this book) -ize.