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"opinionated" is also used as a crossword clue. If that's what you saw, the answer is often dogmatic (8 letters).
Definitions
obstinate in your opinions
Used in a sentence
“Her dad is so opinionated that when he's around it is hard to simply relax and have a light conversation.”
“Her dad is so opinionated that the others' preferences were overridden and no one had any fun on the outing.”
“His essay was opinionated, which was a problem because the assignment had been to write a factual analysis.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Full of firm views”11 letters
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