defile

Short definition from Wiktionary

Verb

1. 1
   To make (someone or something) physically dirty or unclean; to befoul, to soil.
2. 2
   To make (someone or something) morally impure or unclean; to corrupt, to tarnish.
3. 3
   To act inappropriately towards or vandalize (something sacred or special); to desecrate, to profane.
4. 4
   To cause (something or someone) to become ritually unclean.
5. 5
   To deprive (someone) of their sexual chastity or purity, often not consensually; to deflower, to rape.
6. 6
   To dishonour (someone).
7. 7
   To become dirty or unclean.
8. 8
   To cause uncleanliness; specifically, to pass feces; to defecate.
9. 9
   To march in a single file or line; to file.
10. 10
    To march across (a place) in files or lines.
11. 11
    Synonym of defilade (“to fortify (something) as a protection from enfilading fire”).

Noun

1. 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.
2. 2
   An act of marching in files or lines.
3. 3
   A single file of soldiers; (by extension) any single file.
4. 4
   An act of defilading a fortress or other place, or of raising the exterior works in order to protect the interior.