Dictionarycontentiouscausing disagreement
adjective

contentious

kun-TEN-shus/kənˈtenʃəs/

Tending to provoke or engage in disagreement.

The planning discussion becomes contentious as the two adults disagree over the model.

A visibly contentious planning discussion: two adults across a small table disagree over a simple building model, one pointing insistently at it while the other firmly rejects the proposal with a raised palm.
Etymology

A word for a struggle or contest produced an adjective meaning quarrelsome. Contentious describes someone inclined to argue or something that invites such disagreement.

In context

PBS Origins 6:18
… So what about that old contentious argument about reparations for the US’s involvement in slavery? It’s an argument …
The History of Reparations

More examples

  • My contentious neighbor argues about every change to the building.
  • They reach an agreement after a contentious meeting.
  • School funding is the most contentious topic on tonight's agenda.

Forms

contentious · more contentious · most contentious

contentiously adverb — In a manner that provokes disagreement.

contentiousness noun — A tendency to argue or provoke disagreement.

Similar words

controversial
Describes disputed matters, not a person's tendency to argue.
argumentative
Emphasizes a person's readiness to argue rather than disputed issues.
divisive
Emphasizes disagreement that separates people into opposing groups.