polarize
definition
to cause people or groups to divide into opposing factions or groups
example
The controversial new policy is likely to polarize public opinion on the matter.
synonyms
divideseparatesplit
word origin — The word 'polarize' comes from the late 19th century, derived from the word 'polar' which is from the Latin 'polaris' meaning 'of the pole', combined with the suffix '-ize' to form a verb.