divisive

If you say something that is intended to make people angry with each other, your words are divisive. If you want to avoid divisive talk at your family's Thanksgiving dinner, it's probably best to avoid discussing politics.

The adjective divisive is related to the verb divide, which means "to separate things or pull them apart." Divisive things divide. That's why it's best to avoid potentially divisive topics like politics if you believe you are in the company of people who have differing opinions. Don't confuse divisive with decisive, which means "able to make decisions" and "unmistakable, beyond a doubt."

Definitions of divisive
1

adj dissenting (especially dissenting with the majority opinion)

Synonyms:
dissentious, factious
discordant
not in agreement or harmony

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