unproduceable
/(ˌ)ʌnprəˈdjuːsɪbl/ /(ˌ)ʌnprəˈdʒuːsɪbl/adjective
= unproducible.
Origin
Early 18th century; earliest use found in Samuel Grascome (1641–1708), nonjuring Church of England clergyman and religious controversialist. From un- + produceable.