Definition of unroadworthiness in US English:

unroadworthiness

noun

  • The state, condition, or fact of not being roadworthy.

Origin

Mid 19th century; earliest use found in American Law Review. From un- + roadworthiness.

Pronunciation

unroadworthiness

/(ˌ)ʌnˈrəʊdˌwəːðɪnɪs/