Thesaurus.com
Dictionary.com
Showing results for untrustworthy. Search instead for untrustwort.
Definitions

untrustworthy

ADJECTIVE
not dependable, unfaithful
Synonyms
STRONGEST
deceitful dishonest disloyal false irresponsible treacherous unreliable unsafe
STRONG
untrusty
WEAK
capricious conniving crooked devious dubious fair-weather faithless fickle fink fly-by-night guileful questionable shady sharp shifty slippery sneaky tricky trustless two-faced two-timing unassured undependable unsure untrue
Antonyms
STRONGEST
faithful frank harmless honest loyal open reliable responsible true trustworthy truthful
WEAK
dependable

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

This flies in the face of all we know about its inner workings: AI can’t think, doesn’t have a mind and, in fact, is inherently untrustworthy.

From The Wall Street Journal • Mar. 20, 2026

Are these the kinds of important tasks you want to give a person who has already shown themselves to have bad judgment at best, and to be untrustworthy at worst?

From MarketWatch • Feb. 13, 2026

According to analysts, risks to stablecoins include an issuer deemed untrustworthy or the threat of hacking.

From Barron's • Nov. 10, 2025

They entered the postseason with an alarmingly untrustworthy bullpen, and that bullpen nearly blew a four-run lead in Game 2.

From Los Angeles Times • Oct. 6, 2025

If there’s someone untrustworthy around, it’s supposed to light up and spin.

From "Harry Potter And The Prisoner Of Azkaban" by J.K. Rowling