-ize

-ize. Etym: [F. -iser, L. -izare, Gr. Defn: 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.

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