complemental (not comparable)

1. Of the nature of a complement; completing.
2. Complementary.
3. (obsolete) Additional; supplemental, accessory; ancillary.
   • 1643, Thomas Browne, Religio Medici, I.18:

     [I]t is an error worse than heresie, to adore these complemental and circumstantial pieces of felicity, and undervalue those perfections and essential points of happiness wherein we resemble our Maker.

4. (obsolete) Of the nature of a ceremony that is not essential but accessory; ceremonial; ceremonious; formal.
5. (obsolete) Of persons: accomplished; talented; experienced.
6. (obsolete) Complimentary.
   • 1603, Michel de Montaigne, chapter 39, in John Florio, transl., The Essayes, […], book I, printed at London: By Val[entine] Simmes for Edward Blount […], OCLC 946730821 ↗:

     I have no skill in ceremonious letters, which have no other substance, but a faire contexture of complemental phrases and curteous words.