This is the 2001st most frequent Turkish word.
sevgilisi
"Sevgilisi" means "his/her/its lover" or "boyfriend/girlfriend" depending on context.
In this sentence, the word 'sevgilisi' means 'girlfriend', referring to a romantic partner in a possessive form (Ali's).
Ali'nin sevgilisi çok nazik bir insandır.
Ali's girlfriend is a very kind person.
Here, 'sevgilisi' is used to mean 'boyfriend', indicating a romantic partner in a possessive context (Julie's).
Julie's sevgilisi ona güzel bir hediye aldı.
Julie's boyfriend bought her a beautiful gift.
In this usage, 'sevgilisi' refers to 'romantic partner', not specifying gender but denoting a significant other of my friend.