Definition of unperformable in English:

unperformable

adjective

  • Not performable; especially impossible to perform or accomplish successfully.

Origin

Late 16th century; earliest use found in Abraham Fleming (c1552–1607), author, literary editor, and Church of England clergyman. From un- + performable.

Pronunciation

unperformable

/(ˌ)ʌnpəˈfɔːməbl/