dilute (http://definr.com/dilute)

     adj : reduced in strength or concentration or quality or purity;
           "diluted alcohol"; "a dilute solution"; "dilute acetic
           acid" [syn: diluted] [ant: undiluted]
     v 1: lessen the strength or flavor of a solution or mixture; "cut
          bourbon" [syn: thin, thin out, reduce, cut]
     2: corrupt, debase, or make impure by adding a foreign or
        inferior substance; often by replacing valuable
        ingredients with inferior ones; "adulterate liquor" [syn:
        adulterate, stretch, debase]