energetic

 
Pronunciation: /ˌɛnəˈdʒɛtɪk/

adjective

  • 1showing or involving great activity or vitality: moderately energetic exercise
  • 2 Physics relating to or characterized by energy (in the technical sense): energetic X-rays

Derivatives

energetically

adverb

Origin:

mid 17th century (in the sense 'powerfully effective'): from Greek energētikos, from energein 'operate, work in or upon' (based on ergon 'work')