Characterized by or causing dissent; prone to disagreement or dispute.
From Latin dissentiosus (from dissentio) plus the adjectival suffix -ous. The suffix -ous turns the noun into a quality descriptor.
Medieval theologians used this exact word to describe 'dissentious monks'—those independent thinkers who questioned church doctrine—and it perfectly captures how disagreement is viewed as a personality trait rather than just an opinion.
Complete word intelligence in one call. Free tier — 50 lookups/day.