Definition of opportuneful in English:

opportuneful

Pronunciation /ɒpəˈtjuːnf(ʊ)l/ /ɒpəˈtʃuːnf(ʊ)l/

adjective

rare
  • Affording opportunity; convenient, favourable.

Origin

Early 17th century; earliest use found in First Part of Jeronimo. From opportune + -ful.