This is the 10270th most frequent Turkish word.
belirttikleri
"The things they indicated/expressed."
Here, "belirttikleri" refers to the act of mentioning, derived from the verb 'belirtmek' meaning 'to specify or indicate'. It is used in the third person plural possessive form as part of an explanatory clause.
Onların belirttikleri nokta oldukça önemliydi.
The point they mentioned was quite important.
In this sentence, "belirttikleri" denotes the issue the individuals referred to. It modifies the noun "sorun," indicating the specific topic they had addressed.
Belirttikleri sorun çözülmek üzere.
The issue they mentioned is about to be resolved.
Here, "belirttikleri" pertains to the suggestions made by them. It is a possessive modifier to "öneriler" describing that the suggestions are those which they mentioned.