Answer: pontificate

AnswerCrossword Clue
PONTIFICATECredo, part 3
PONTIFICATEGovernment of the Roman Catholic Church
pontificateto speak in a pompous or dogmatic manner.
pontificateExpress one's opinions in a way considered annoyingly pompous and dogmatic
pontificateto speak in a pompous and dogmatic manner
pontificate(in the Roman Catholic Church) Officiate as bishop, esp. at Mass