Source : Webster's Revised Unabridged Dictionary (1913)

Deprecative \Dep"re*ca*tive\, a. [L. deprecativus: cf. F.
   d['e]pr['e]catif.]
   Serving to deprecate; deprecatory. -- {Dep"re*ca*tive*ly},
   adv.

Source : WordNet®

deprecative
     adj 1: tending to diminish or disparage; "belittling comments";
            "managed a deprecating smile at the compliment";
            "deprecatory remarks about the book"; "a slighting
            remark" [syn: {belittling}, {deprecating}, {deprecatory},
             {depreciative}, {depreciatory}, {slighting}]
     2: given to expressing disapproval