mountain
The Italian word 'montagna' is used very similarly to the English word 'mountain'. It represents a large natural elevation of the earth's surface rising abruptly from the surrounding level. It can be used in various contexts, just like in English, including physical geography, metaphoric expressions, and as a part of idiomatic phrases.
I will go to the mountain this weekend.
This sentence is in the future tense, indicating a planned future action. The speaker plans to go to the mountain over the weekend.
The view from the mountain is spectacular.
This sentence is in the present tense, and describes a state or characteristic of the view from the mountain. It uses an adjective, 'spectacular' to describe the view.
The mountain air is very fresh.
This sentence is in the present tense, and it describes a characteristic of the mountain air using an adjective, 'fresh'. It uses the definite article 'the' to specify which air is being talked about, namely, the air of the mountain.