し知shiりriあ合aいiし知shiりあいriaiし知shiりriあい合ai
1.
A person with whom one has a mutual understanding, familiarity, or connection that is more than superficial, often established through social interactions.
2.
The state of being familiar with someone, characterized by a degree of knowledge about each other's backgrounds, interests, or situations, typically as a result of prior interactions.
3.
A relationship involving an individual one knows moderately well, but not to the extent of being close friends or intimate companions, often resulting from shared experiences or social circles.
Example:
どこで彼女と知り合いになったのか。