ominous
C1Adjektiv/US /ˈɑmənəs/ ÄM-ən-əs; UK /ˈɑmənəs/ ÄM-ən-əs/
Of or pertaining to an omen or to omens; being or exhibiting an omen; significant; portentous; -- formerly used both in a favorable and unfavorable sense; now chiefly in the latter; foreboding or foreshowing evil; inauspicious; as, an ominous dread.
