This is the 1945th most frequent Russian word.
родственников
"Relatives" or "family members."
Here, the word "родственников" is used in the accusative plural form to indicate the direct object of the verb "наещать" (to visit). It refers to family members or relatives.
Я навещаю родственников каждое лето.
I visit relatives every summer.
In this sentence, 'родственниками' is in the instrumental plural form, used to describe with whom the action of the sentence (having a celebration) occurred. The word denotes family members or relatives involved in the event.
У нас был праздник с родственниками.
We had a celebration with relatives.
In this context, 'родственниках' is in the prepositional plural form, used after the preposition 'о' (about) to discuss the topic of the conversation – here, referring to family members or relatives.