The Collaborative International Dictionary
Infaust
Infaust \In*faust"\, a. [L. infaustus; pref. in- not + faustus
fortunate, lucky.]
Not favorable; unlucky; unpropitious; sinister. [R.]
--Ld.
Lytton.
Wiktionary
infaust
a. (context archaic English) unlucky, unfortunate, ill-omened; unpropitious; sinister