commentator
com‧men‧ta‧tor AC /ˈkɒmənteɪtə $ ˈkɑːmənteɪtər/
noun [countable]1. someone who knows a lot about a particular subject, and who writes about it or discusses it on the television or radio:
political commentators
2. someone on television or radio who describes an event as it is happening:
a sports commentator
com‧men‧ta‧tor AC /ˈkɒmənteɪtə $ ˈkɑːmənteɪtər/
noun [countable]1. someone who knows a lot about a particular subject, and who writes about it or discusses it on the television or radio: 2. someone on television or radio who describes an event as it is happening: