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powerless

[pou-er-lis] /ˈpaʊ ər lɪs/
adjective
1.
unable to produce an effect:
a disease against which modern medicine is virtually powerless.
2.
lacking power to act; helpless:
His legs crumpled, and he was powerless to rise.
Origin of powerless
1545-1555
1545-55; power + -less
Related forms
powerlessly, adverb
powerlessness, noun
Synonyms
1. ineffective. 2. feeble, impotent, prostrate, infirm.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for powerless

powerless

/ˈpaʊəlɪs/
adjective
1.
without power or authority
Derived Forms
powerlessly, adverb
powerlessness, noun
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
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Word Origin and History for powerless
adj.

early 15c., "lacking might or fortitude," from power (n.) + -less. Related: Powerlessly; powerlessness.

Online Etymology Dictionary, © 2010 Douglas Harper
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14
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