Definition of unpayable in US English:

unpayable

adjective

  • 1Of a debt, charge, obligation, etc.

  • 2Originally and chiefly Australian Mining. Incapable of yielding an adequate return; unremunerative, unprofitable.

Origin

Early 16th century; earliest use found in George Ashby (d. 1475), administrator and poet. From un- + payable.

Pronunciation

unpayable

/(ˌ)ʌnˈpeɪəbl/