This is the 300th most frequent Italian word.
coppia
Pair; couple.
In this sentence, 'coppia' is used to refer to a pair of individuals associated together by a relationship, in this case, friendship.
La coppia di amici era molto unita.
The pair of friends was very close.
Here, 'coppia' refers to a set of two items that are used together and considered a unit.
Ho bisogno di una coppia di pile per il telecomando.
I need a pair of batteries for the remote control.
In this context, 'coppia' describes two individuals who are in a marital relationship.