Definition

Not honest or truthful; likely to tell lies or deceive others.

Example

He was untruthful about his whereabouts last night.

Conversation

Did you hear what he said about her?

Yeah, it sounded pretty untruthful to me.

I can't believe people would spread such lies.

I know, it’s really disappointing when someone is so untruthful.

Synonyms & Antonyms

Root Explanation

Untruthful → It is formed from "un-" (meaning not) and "truthful" (from "truth" which comes from Old English "triewð", meaning fidelity or faithfulness, and the suffix "-ful" meaning full of). The word "untruthful" means not full of truth or lacking in honesty.

Memory Tip

Think of 'not' ('un-') being added to 'full of truth' ('truthful') — that's why untruthful means lacking honesty.

Visually Confused Words