self-opinionated

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

自以为是, 固执己见, 武断

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

:
His self-opinionated remarks often alienated his colleagues.
自以为是的言论常常疏远了他的同事。
She was too self-opinionated to consider other viewpoints.
她太自以为是了,不愿考虑其他观点。