This is the 2517th most frequent Turkish word.
mücadelenin
"Of the struggle" or "of the fight."
Here, "mücadelenin" is the possessive form of "mücadele" (struggle), indicating something belonging to or associated with the struggle.
Mücadelenin zor olduğunu biliyoruz.
We know that the struggle is difficult.
Here, "mücadelenin" shows the genitive case of "mücadele" to express a relationship of possession, referring to the management related to the struggle.
Mücadelenin yönetimi etkili olmalıdır.
The management of the struggle must be effective.
Here, "mücadelenin" denotes the association between the struggle and its results, also showing possession.