1) Interpret 2) Make a commentary on 3) To act as a commentator 4) To provide a commentary 
• (v. t. & i.) To write comments or notes upon; to make comments.
Com'men·tate transitive verb & i. [ Latin commentatus , past participle of commentari to meditate.] To write comments or notes upon; to make comments. [ R.] « Commentate upon it, and return it enriched. Lamb. » 
[v] - make a commentary on 2. [v] - serve as a commentator, as in sportscasting
verb serve as a commentator, as in sportscasting