Dictionary.com/probity (etymology):

probity (PRO-buh-tee) noun

Complete and confirmed integrity; uprightness: “He was a gentlemanly Georgian, a person of early American probity” (Mary McGrory).

Source: The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2000 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.

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n : complete and confirmed integrity

Source: WordNet ® 2.0, © 2003 Princeton University