ominous

4

OMINOUS 

[adjective] 

1. portending evil or harm; foreboding; threatening; inauspicious. 

2. indicating the nature of a future event, for good or evil; having the significance of an omen; being a portent.

Etymology: from Latin ōminōsus, “portentous”, equivalent to ōmin- (stem of ōmen), “omen; augury; foreboding”.

[Dan Mumford - The Earth Itself, Shall Rise From Below, and Tower Over All]