Meaning : Threatening or foreshadowing evil or tragic developments.
Example :
A baleful look.
Forbidding thunderclouds.
His tone became menacing.
Ominous rumblings of discontent.
Sinister storm clouds.
A sinister smile.
His threatening behavior.
Ugly black clouds.
The situation became ugly.
Synonyms : baleful, forbidding, menacing, minacious, minatory, sinister, threatening
Meaning : Presaging ill fortune.
Example :
Ill omens.
Ill predictions.
My words with inauspicious thunderings shook heaven.
A dead and ominous silence prevailed.
A by-election at a time highly unpropitious for the Government.
Synonyms : ill, inauspicious