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Definition of unprincipled - 3 dictionary results

un⋅prin⋅ci⋅pled

  [uhn-prin-suh-puhld]
Use unprincipled in a Sentence
–adjective
1. lacking or not based on moral scruples or principles: an unprincipled person; unprincipled behavior.
2. not instructed in the principles of something (usually fol. by in).
Origin:
1625–35; un- 1 + principled

Related forms:
un⋅prin⋅ci⋅pled⋅ness, noun

Synonyms:
1. tricky, dishonest. See unscrupulous.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To unprincipled
un·prin·ci·pled   (ŭn-prĭn'sə-pəld)   
adj.  Lacking principles or moral scruples; unscrupulous: unprincipled behavior.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

unprincipled 
1634, "not instructed" (in something), from un- (1) "not" + principled (see principle). Meaning "not honorable" is recorded from 1644.
Online Etymology Dictionary, © 2001 Douglas Harper
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