Pontifex Maximus
/ˈmæksɪməs/noun
1- (in ancient Rome) the head of the principal college of priests（古罗马）大祭司长。
1.1
- (in the Roman Catholic Church) a title of the Pope（罗马天主教教会）教皇。
词源
Maximus, superlative of Latin magnus 'great'.