Definition of unprevailing in US English:

unprevailing

adjective

  • 1Not superior or victorious; ineffective, unsuccessful.

  • 2Not prevalent or usual. rare.

Origin

Early 17th century; earliest use found in William Shakespeare (1564–1616), playwright and poet. From un- + prevailing.

Pronunciation

unprevailing

/ˌʌnprɪˈveɪlɪŋ/