suffix forming verbs▶ USAGE In Britain and the US -ize is the preferred ending for many verbs, but -ise is equally acceptable in British English. Certain words (chiefly those not formed
by adding the suffix to an existing word) are, however, always spelt with -ise in both Britain and the US: advertise, revise 1.
to cause to become, resemble, or agree
to become; change into
Collins English Dictionary. Copyright © HarperCollins Publishers
Word origin of '-ize'from Old French -iser, from Late Latin -izāre, from Greek -izein