de todos os

listen to the pronunciation of de todos os
البرتغالية - الإنجليزية
of all

I disposed of all the books. - Me livrei de todos os livros.

I like May the best of all the months. - De todos os meses, maio é o que eu mais gosto.

Used as an intensifier with nouns to denote being ultimate
Used as an intensifier with superlative forms of adjectives

He was the greatest playwright of all.

See: 'of all people'