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energetic

[en-er-jet-ik]
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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.
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Sometimes en·er·get·i·cal.

Origin of energetic

1645–55; < Greek energētikós, equivalent to energē- (en- en-2 + ergē-, variant stem of ergeîn to be active; see energy) + -tikos -tic
Related formsen·er·get·i·cal·ly, adverbhy·per·en·er·get·ic, adjectivenon·en·er·get·ic, adjectivenon·en·er·get·i·cal·ly, adverbqua·si-en·er·get·ic, adjectivequa·si-en·er·get·i·cal·ly, adverbsu·per·en·er·get·ic, adjectivesu·per·en·er·get·i·cal·ly, adverbul·tra·en·er·get·ic, adjectiveun·en·er·get·ic, adjectiveun·en·er·get·i·cal·ly, adverb

Synonyms

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2. effectual, strong, potent.

Synonym study

1. See active.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for hyper-energetic

energetic

adjective
  1. having or showing much energy or force; vigorous
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Derived Formsenergetically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hyper-energetic

energetic

adj.

1650s, "powerful," from Greek energetikos "active," from energein "to work, act upon" (see energy). Of persons, "active," in English from 1796 (energetical is from c.1600).

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Online Etymology Dictionary, © 2010 Douglas Harper