couple
In Italian, 'coppia' is used to refer to a pair or a couple, in the sense of two people in a relationship or two items that are typically seen together or associated with each other. Note, however, that it may not be used interchangeably in all contexts where 'couple' is used in English. The context in which it is used will dictate its exact meaning.
They have a beautiful pair of dogs.
In this sentence, 'coppia' is used to denote a pair, specifically referring to a pair of something, which in this case is 'dogs'.
The couple is heading towards the restaurant.
Here, 'coppia' is used to refer to a romantic couple. The context suggests that the couple in question is going to a restaurant.
We need to find a pair of volunteers.
In this example, 'coppia' refers to a pair or a duo. It indicates that two volunteers are needed.