Inauspicious, a.
Not auspicious; ill-omened; unfortunate; unlucky; unfavorable. "Inauspicious stars." Shak. "Inauspicious love." Dryden. -- In`aus*pi"cious*ly, adv. -- In`aus*pi"cious*ness, n.
Shades of meaning
Fernald lists inauspicious only as an antonym, under propitious.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given