seemingly familiar; to feel as if one has met someone or seen something before

to have never met before; to be completely unacquainted with one another

Someone that you have known for a long time; an old friend.

(idiom) Out of an exchange of blows, friendship grows; used to describe how people can become better acquainted or even close friends after having a disagreement or fight

out of a fight a friendship may grow; one does not make friends without a exchange of blows.

A friend or person whom one has known for a long time

To be unacquainted; to not know one another