This is the 3404th most frequent Turkish word.
komşu
Neighbor.
In this sentence, 'komşum' functions as a noun meaning 'my neighbor,' referring to a person living nearby.
Komşum dün taşındı ve yeni evi çok güzel.
My neighbor moved yesterday and the new house is very beautiful.
Here, 'komşu' is used as an adjective to describe 'mahalle' (neighborhood), indicating adjacency or proximity.
Ben komşu mahallede çalışıyorum, bu yüzden her sabah yürüyerek gidiyorum.
I work in the neighboring district, so I walk there every morning.
In this case, 'komşuya' is the dative form of 'komşu,' meaning 'to the neighbor,' highlighting direction or recipient.