heretical

US /həˈret̬.ɪ.kəl/
UK /həˈret̬.ɪ.kəl/
"heretical" picture
1.

of or relating to heresy or heretics

:
The church condemned his heretical views.
He was accused of spreading heretical doctrines.
2.

holding an opinion at odds with what is generally accepted

:
His ideas on education were considered heretical by traditionalists.
To suggest such a thing would be almost heretical in this community.