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.

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

Americans also think A.I. is untrustworthy as a tool.

From Slate • Dec. 26, 2025

When GPS has become so untrustworthy we need the help of quantum physics.

From The Wall Street Journal • Nov. 23, 2025

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

From Barron's • Nov. 10, 2025

Will it always be confined and untrustworthy like it feels today?

From "Ask the Passengers" by A.S. King

untrustworthy

Example Sentences

Related Words