opinionative

/əˌpɪnjəˈneɪtɪv/
adjective
  1. Tending to express strong personal opinions, often without considering other viewpoints.
    • My uncle is very opinionative about politics and rarely listens to anyone else.
    • The opinionative reviewer gave the movie one star without explaining why.
    • Being opinionative can be useful in a debate, but it may hurt friendships.
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