complimentative

From compliment (verb) +‎ -ative.^[1]

complimentative (comparative more complimentative, superlative most complimentative)

1. (archaic) complimentary
   • March 3 1778, James Boswell, letter to Edmund Burke

     This may be perhaps a singular method of beginning a correspondence ; and in one sense may not be very complimentative. But I can sincerely assure you , dear sir , that I feel and mean a genuine compliment to Mr. Burke himself

• “complimentative”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.