energetic

[en-er-jet-ik]
adjective
1.
possessing or exhibiting energy, especially in abundance; vigorous: an energetic leader.
2.
powerful in action or effect; effective: to take energetic measures against crime.
Also, energetical.


Origin:
1645–55; < Greek energētikós, equivalent to energē- (en- en-2 + ergē-, variant stem of ergeîn to be active; see energy) + -tikos -tic

energetically, adverb
hyperenergetic, adjective
nonenergetic, adjective
nonenergetically, adverb
quasi-energetic, adjective
quasi-energetically, adverb
superenergetic, adjective
superenergetically, adverb
ultraenergetic, adjective
unenergetic, adjective
unenergetically, adverb


1. See active. 2. effectual, strong, potent.
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World English Dictionary
energetic (ˌɛnəˈdʒɛtɪk)
 
adj
having or showing much energy or force; vigorous
 
ener'getically
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

energetic
1650s, powerful, from Gk. energetikos active, from energein (see energy). Meaning active in English is from late 18c.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
He was relentlessly energetic, creative and gracious.
Scientists have developed software programs to perform calculations based on
  atomic sizes and energetic interactions.
The band's songs are bright and sharp and energetic, each more tuneful than the
  last.
Both men are near 80 but still energetic.
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