implausibly.

In a way that appears difficult to believe or inconsistent with reasonable expectations.

Use it for

Words that belong together

• implausibly large
• implausibly claim

On the page

The forecast required an implausibly large improvement within the available time.

He implausibly claimed to have checked every record without access to the archive.

Usage notes

Primary category: analysis / argumentation / evidence. Forms: Invariable adverb; use more or most only where natural. 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. Writing functions: evidence assessment, qualification, argument critique, assumption analysis. Disciplines: argumentation, logic, research interpretation, formal writing. Commonness: moderately common.