defile vs expunge

defile

verb
  • To act inappropriately towards or vandalize (something sacred or special); to desecrate, to profane. 

  • To make (someone or something) physically dirty or unclean; to befoul, to soil. 

  • Synonym of defilade (“to fortify (something) as a protection from enfilading fire”) 

  • To make (someone or something) morally impure or unclean; to corrupt, to tarnish. 

  • To cause (something or someone) to become ritually unclean. 

noun
  • 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. 

  • A single file of soldiers; (by extension) any single file. 

  • An act of marching in files or lines. 

  • An act of defilading a fortress or other place, or of raising the exterior works in order to protect the interior. 

expunge

verb
  • To erase or strike out. 

  • To eliminate completely; to annihilate. 

  • To delete permanently (e-mail etc.) that was previously marked for deletion but still stored. 

How often have the words defile and expunge occurred in a corpus of books? (source: Google Ngram Viewer )