This is the 188th most frequent Azerbaijani word.
rayonu
The Azerbaijani word "rayonu" means "district" or "region" in English.
Here, 'rayonu' is used to mean 'district,' specifically referring to a central administrative division within Baku.
Mən Bakının mərkəzi rayonu olan Sabunçu rayonu haqqında məlumat verdim.
I provided information about Sabunchu district, a central district of Baku.
'Rayonu' is used to refer to a specific neighboring district being visited.
Qonşu rayonu gəzəcəyik ki, oranın bazarına baş çəkək.
We will visit the neighboring district to explore its market.
In this sentence, 'rayonu' describes a new, unnamed district under development in a general region.