untrustworthy.

Not reliable or honest enough to be safely relied on.

Use it for

Words that belong together

• untrustworthy source
• untrustworthy account

On the page

The anonymous account proved untrustworthy.

Usage notes

Primary category: analysis / argumentation / evidence. Forms: Comparative more untrustworthy; superlative most untrustworthy when comparison is meaningful. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Commonness: moderately common.