Tending to contradict or dispute; characterized by contradiction; argumentative or contrary in nature.
From 'contradiction' (Latin 'contradictio') plus the adjective suffix '-ious' (full of, characterized by), an older English suffix form.
A 'contradictious' person isn't just someone who disagrees—they habitually argue the opposite of what's proposed, even if they secretly agree, making them exhausting to work with.
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