1590s, "commit to writing, cause to be remembered by writing or inscription;" see memory + -ize. The meaning "commit to memory, learn by heart, keep in memory, have always in mind" is by 1838. Related: Memorized; memorist; memorizing.
Have you memorized your lines for the play yet?
Memorial Day
memorialize
memorious
memorise
memorization
memorize
memory
Memphis
mem-sahib
men
*men-
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