pontificate >> /pɑnˈtɪfɪˌkeɪt/
Definition: [intransitive verb] Express one's opinions in a way considered annoyingly pompous and dogmatic.
Example: he was pontificating about art and history
Definition: [intransitive verb] (in the Roman Catholic Church) officiate as bishop, especially at Mass.
Example: he pontificated at three Christmas Masses
Definition: [noun] (in the Roman Catholic Church) the office or tenure of pope or bishop.
Example: Pope Gregory VIII enjoyed only a ten-week pontificate