infeasible.

Not possible or realistic under the relevant conditions or constraints.

Use it for

Words that belong together

• infeasible proposal
• financially infeasible

On the page

The route was infeasible without an additional water supply.

Usage notes

Primary category: academic / formal. Forms: Normally non-gradable; no ordinary comparative or superlative. 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: evaluation. Commonness: moderately common.