This is the 5103rd most frequent Portuguese word.
montanha
"Montanha" means "mountain" in English.
The word 'montanha' is used here to denote a physical geographical feature that is tall and typically is climbed.
Eu escalei a montanha ontem.
I climbed the mountain yesterday.
Here, 'montanha' is used metaphorically to describe a large amount or pile of items resembling a mountain.
Aquela montanha de livros sobre a mesa me surpreendeu.
That mountain of books on the table surprised me.
The word 'montanhas' refers to the plural form and implies a mountainous region often considered for leisure and vacation.