Question

what is the word root of memorialize?
me-
-ize
mem
memorial

Explanation:

A word root carries the core meaning of a word. "-ize" is a suffix that turns nouns/adj into verbs. "mem-" is a truncated form, while "memorial" is a noun form of the root. The root "mem" comes from Latin memor meaning "mindful, remembering", which is the core meaning behind "memorialize" (to commemorate, based on memory).

Answer:

mem