super- + enthusiastic
superenthusiastic (comparative more superenthusiastic, superlative most superenthusiastic)
- Highly enthusiastic.
2008 March 10, Jon Pareles, “Music Ripe to Remix”, in New York Times:
- Ethan Miller, the superenthusiastic singer, songwriter and guitarist of this sextet, has played for most of this decade with another band, Comets on Fire.