hole
The French word 'trou' is used in a similar way to the English word 'hole'. It can refer to a hollow or opening in a surface, such as a hole in the ground or a hole in a piece of fabric. It can also be used metaphorically to describe a difficult or unpleasant situation, as in the phrase 'se mettre dans un trou', which means 'to get oneself into a mess'.
There is a hole in my trousers.
This sentence is telling there is a hole in the speaker's trousers. The word 'trou' in French is used to denote a hole or gap, similar to how 'hole' is used in English.
I found a black hole in space.
In this sentence, 'trou noir' refers to a black hole, which in astronomy is a region of spacetime where gravity is so strong that nothing, even particles and light, can escape from it.
He is digging a hole in the garden.
This phrase is describing an action where someone is making a hole in the garden. 'Trou' in this context refers to the hole being dug in the ground.