desert
The word 'désert' in French is directly translated as 'desert' in English and is used to represent an arid, usually sandy area, where there is little rain and not many plants. It can also be used metaphorically in French to denote a lack or absence of something.
The desert is a very hot place during the day
In this sentence, 'désert' is used as a subject to describe a general condition or characteristic about deserts, which is that they are very hot during the day.
We must cross the desert to reach our destination
In this sentence, 'désert' is used as a direct object. The action or the verb of the sentence is 'traverser' (to cross), and 'désert' is the object being acted upon or being 'crossed'.
There is little life in the desert
In this sentence, 'désert' is used as part of a prepositional phrase. The preposition 'dans' (in) introduces the phrase 'le désert', describing where there is 'little life'.