self-opinionated

US /ˌself.əˈpɪn.jə.neɪ.tɪd/
UK /ˌself.əˈpɪn.jə.neɪ.tɪd/
"self-opinionated" picture
1.

独善的な, 自説を曲げない, うぬぼれた

having a high opinion of oneself or one's own opinions; conceited or dogmatic

:
His self-opinionated remarks often alienated his colleagues.
彼の独善的な発言はしばしば同僚を遠ざけた。
She was too self-opinionated to consider other viewpoints.
彼女は独善的すぎて、他の視点を考慮しなかった。