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[uhn-prin-suh-puh ld] /ʌnˈprɪn sə pəld/
lacking or not based on moral scruples or principles:
an unprincipled person; unprincipled behavior.
not instructed in the principles of something (usually followed by in).
Origin of unprincipled
1625-35; un-1 + principled
Related forms
unprincipledness, noun
1. tricky, dishonest. See unscrupulous. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for unprincipled
  • They find, on all sides, bounds to their unprincipled ambition in any fixed order of things.
  • The facts change, positions change, nothing unprincipled about that.
  • There are too many people who are unethical and unprincipled for that to work.
  • Not only is that ruling absurd, but it is completely unprincipled.
  • Because we've ruled out both unprincipled engagement, as well as nonengagement.
  • In the end, a vicious, unprincipled fear offensive failed to block reform.
  • We constantly strive to insure integrity, and guard against dishonest or unprincipled practices.
  • Otherwise people will think you are unprincipled hypocrites.
British Dictionary definitions for unprincipled


lacking moral principles; unscrupulous
(foll by in) (archaic) not versed in the principles of (a subject)
Derived Forms
unprincipledness, 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 unprincipled

1630s, "not instructed" (in something), from un- (1) "not" + principled. Meaning "not honorable" is recorded from 1640s.

Online Etymology Dictionary, © 2010 Douglas Harper
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