This is the 1332nd most frequent Turkish word.
kimsenin
"Kimsenin" means "nobody's" or "no one's" in English.
In this sentence, 'kimsenin' is used as a genitive case, indicating possession by an indefinite pronoun.
Kimsenin kitabını kaybetmek istemem.
I don't want to lose anyone's book.
Here, 'kimsenin' signifies possession and indicates exclusivity regarding permissions in a generic sense.
Bu alanda kimsenin izni olmadan dolaşmak yasaktır.
It is prohibited to wander in this area without anyone's permission.
In this example, 'kimsenin' refers to the help that does not come from any person, indicating a lack of assistance.