purge vs undress

purge

verb
  • To remove by cleansing; to wash away. 

  • To free from sin, guilt, or the burden or responsibility of misdeeds. 

  • To void or evacuate (the bowels or the stomach); to defecate or vomit. 

  • To forcibly remove people from. 

  • To have or produce frequent evacuations from the intestines, as by means of a cathartic. 

  • To trim, dress, or prune. 

  • To clarify; to clear the dregs from (liquor). 

  • To cause someone to purge, operate on (somebody) as or with a cathartic or emetic, or in a similar manner. 

  • To clean thoroughly; to cleanse; to rid of impurities. 

  • To forcibly remove, e.g., from political activity. 

  • To become pure, as by clarification. 

  • To clear of a charge, suspicion, or imputation. 

noun
  • An evacuation of the bowels or a vomiting. 

  • That which purges; especially, a medicine that evacuates the intestines; a cathartic. 

  • A cleansing of pipes. 

  • An act of purging. 

  • A forcible removal of people, for example, from political activity. 

undress

verb
  • To strip of something. 

  • To remove the clothing of (someone). 

  • To remove one's clothing. 

  • To remove one’s clothing. 

  • To take the dressing, or covering, from. 

noun
  • Partial or informal dress for women, as worn in the home rather than in public. 

  • Informal clothing for men, as opposed to formal or ceremonial wear. 

  • Now more specifically, a state of having few or no clothes on. 

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