commentate

from WordNet (r) 3.0 (2006)

commentate
    v 1: make a commentary on
    2: serve as a commentator, as in sportscasting

from The Collaborative International Dictionary of English v.0.48

Commentate \Com"men*tate\, v. t. & i. [L. commentatus, p. p. of
   commentari to meditate.]
   To write comments or notes upon; to make comments. [R.]
   [1913 Webster]

         Commentate upon it, and return it enriched. --Lamb.
   [1913 Webster]