This is the 7287th most frequent Korean word.
지인
Acquaintance or close associate.
In this sentence, '지인' refers to an acquintance or someone you know casually who is organizing the party.
지인이 주최하는 파티에 초대를 받았어요.
I received an invitation to a party hosted by an acquaintance.
Here, '지인들' means a group of acquaintances referring to individuals with whom you have a friendly yet not close relationship.
지인들과 함께 여행 계획을 세우고 있어요.
I am planning a trip together with acquaintances.
In this usage, '지인' implies new connections or relationships formed in professional or social contexts.