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

1.
presunçoso, dogmático, teimoso
having a high opinion of oneself or one's own opinions; conceited or dogmatic
:
•
His self-opinionated remarks often alienated his colleagues.
Suas observações presunçosas frequentemente afastavam seus colegas.
•
She was too self-opinionated to consider other viewpoints.
Ela era muito presunçosa para considerar outros pontos de vista.