Webster's English Dictionary

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adulterate

1. adul.ter.ate \*-'d*l-t*-.ra-t\ \-.ra-t-*r\ n [L adulteratus, pp. of 
   adulterare, fr. ad- + alter othe]r - more at ELSE : to corrupt, debase, or 
   make impure by the addition of a foreign or infer ior substance; esp : to 
   prepare for sale by replacing more valuable or inert ingredients in whole 
   or in part - adul.ter.a.tor n
2. adul.ter.ate \*-'d*l-t(*-)r*t\ aj 1: tainted with adultery : ADULTEROUS  
   2: ADULTERATED, SPURIOUS