Definition of unpropitiousness in US English:

unpropitiousness

noun

  • Lack of propitiousness; inauspiciousness, unfavourableness.

Origin

Mid 18th century; earliest use found in Christopher Smart (1722–1771), poet. From unpropitious + -ness, after propitiousness.

Pronunciation

unpropitiousness

/(ˌ)ʌnprəˈpɪʃəsnəs/