energetic
Cross references:
1. vigorous
en.er.get.ic \.en-*r-'jet-ik\ \-i-k(*-)le-\ aj [Gk energe-tikos, fr.
energein to be active, fr. energos] 1: marked by energy : STRENUOUS 2:
operating with vigor or effect 3: of or relating to energy {~ equation} -
en.er.get.i.cal.ly av
Webster's English Dictionary