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Origin of trustworthy

First recorded in 1800–10; trust + worthy
Related formstrust·wor·thi·ly, adverbtrust·wor·thi·ness, nounun·trust·wor·thi·ly, adverbun·trust·wor·thi·ly·ness, nounun·trust·wor·thy, adjective

Synonyms for trustworthy

See more synonyms for on Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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Contemporary Examples of trustworthiness

Historical Examples of trustworthiness

British Dictionary definitions for trustworthiness


  1. worthy of being trusted; honest, reliable, or dependable
Derived Formstrustworthily, adverbtrustworthiness, 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

Word Origin and History for trustworthiness



1791, from trust (n.) + worthy. Related: Trustworthiness.

Online Etymology Dictionary, © 2010 Douglas Harper