defile

باللغة العربية: مضيق، ممر ضيق

1. A narrow passage or way (originally (military), one which soldiers could only march through in a single file or line), especially a narrow gorge or pass between mountains. (figuratively)
2. An act of marching in files or lines. (figuratively)
3. A single file of soldiers; (by extension) any single file. (figuratively)

الجمع defiles