INAUSPICIOUSLY
inauspiciously, unpropitiously
(adverb) in an inauspicious manner; “he started his new job inauspiciously on Friday the 13th”
Source: WordNet® 3.1
Etymology
Adverb
inauspiciously (comparative more inauspiciously, superlative most inauspiciously)
In an inauspicious manner.
Source: Wiktionary
INAUSPICIOUS
In`aus*pi"cious, a.
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition