untrustworthy

Untrustworthy is an adjective used to describe a person, source, or piece of information that is not worthy of trust. It implies that the subject is likely to deceive, break confidences, or act with a lack of integrity.

Etymology and scope: The term is formed from the prefix un- attached to trustworthy, which denotes reliability or honesty. It is a value judgment rather than a neutral assessment of skill, and it can apply to behavior, statements, or entities that undermine confidence.

Usage and examples: A person who lies, betrays a secret, or repeatedly violates commitments may be described as untrustworthy. A source that consistently misreports facts or a witness with a history of altering testimony can also be labeled untrustworthy. It can also describe information that seems biased, manipulated, or otherwise questionable.

Nuance and distinctions: Untrustworthy often carries a stronger ethical condemnation than unreliable. Unreliability can result from carelessness or incompetence, while untrustworthy suggests deliberate or repeated failures to honor trust. The word is subjective and contextual, and its use should reflect evidence rather than rumor.

See also: Related terms include trust, trustworthiness, reliability, and integrity.