Source : Webster's Revised Unabridged Dictionary (1913)

Deprecatory \Dep"re*ca*to*ry\, a. [L. deprecatorius.]
   Serving to deprecate; tending to remove or avert evil by
   prayer; apologetic.

         Humble and deprecatory letters.          --Bacon.

Source : WordNet®

deprecatory
     adj : 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}, {deprecative},
            {depreciative}, {depreciatory}, {slighting}]