defecate

Short definition from Wiktionary

Verb

1. 1
   To excrete feces from one's bowels.
2. 2
   To pass (something) as excrement; to purge.
3. 3
   To clean (something) of dregs, impurities, etc.; to purify.

Adjective

1. 1
   Freed from pollutants, dregs, lees, etc.; refined; purified.