This is the 4215th most frequent Turkish word.
müsabakanın
"Of the competition/match."
Here, 'müsabakanın' is the possessive form of 'müsabaka', meaning 'of the competition', indicating ownership or relevance.
Müsabakanın kazananı belli oldu.
The winner of the competition has been decided.
In this sentence, 'müsabakanın' again demonstrates possession, relating 'beginning' to 'competition'.
Biz müsabakanın başlangıcını kaçırdık.
We missed the start of the competition.
Here, 'müsabakanın' links the 'rules' to 'competition', demonstrating possessive relationship.