This is the 17350th most frequent Russian word.
таможенный
"Customs" or "relating to customs."
The word "таможенный" is used as an adjective to describe the type of control being from customs.
Таможенный контроль был достаточно строгим.
The customs control was quite strict.
The word "таможенный" modifies "управление," indicating that it is associated with customs.
Он работает в таможенном управлении.
He works in the customs administration.
The word "таможенный" describes "досмотр," specifying the inspection is performed by customs.