black
In Italian, 'nero' is the term used for the color black. Just like English, it can be used to describe objects, clothing, hair color, etc. It is also used in certain phrases and expressions. For example, 'gatto nero' means 'black cat'.
The black cat jumped on the wall.
This is a simple statement describing an action performed by a black cat. 'Il gatto nero' refers to 'The black cat' and 'è saltato sul muro' describes the action 'jumped on the wall'.
The sky is black tonight.
This sentence is used to convey the description of the sky during a particular night. 'Il cielo' translates to 'The sky' and 'è nero stasera' translates to 'is black tonight'.
I bought a black dress.
This is a simple statement which states a recent purchase made by the speaker. 'Ho comprato' means 'I bought', and 'un vestito nero' is translated as 'a black dress'.