This is the 266th most frequent Armenian word.
գեղարքունիքի
"Գեղարքունիքի" refers to "of Gegharkunik," relating to the Gegharkunik Province in Armenia.
Here 'գեղարքունիքի' refers to the name of a geographical location, specifically Gegharkunik, which is used as a possessive noun to describe its lake.
Գեղարքունիքի լիճն ամենամեծն է Հայաստանում։
The Lake Gegharkunik is the largest in Armenia.
In this sentence, 'գեղարքունիքի' is used as an attributive noun designating the region, specifically modifying 'շրջանի' to specify which region's historical sites were visited.
Մենք այցելեցինք Գեղարքունիքի շրջանի պատմական վայրերը։
We visited the historical sites of Gegharkunik region.
Here 'գեղարքունիքի' is used to denote possession, referring to the nature belonging to or located in Gegharkunik.