pontificate
🇺🇸
/pɑːnˈtɪfɪkeɪt/
🇬🇧
/pɒnˈtɪfɪkeɪt/
to express opinions in a way that seems very certain and important
He likes to pontificate about politics at dinner parties.
the position or time when someone is Pope
During his pontificate, he made significant reforms in the Church.