دربند

Etymology
Borrowed from, which is from (i.e. literally: "barred gate").

Noun

 * 1)  narrows, pass; a narrow place where one may cross when travelling
 * 2) derbend, a small fort or outpost at a remote, usually mountainous location
 * 1) derbend, a small fort or outpost at a remote, usually mountainous location

Usage notes
The pronunciation derbent is more formal, whereas dervent was used in colloquial speech and thence passed to most Balkan languages, according to Georgiev mostly through to account for the loss of the final -t in, ,.