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, ominous, threatening
Meaning : Stemming from evil characteristics or forces. Wicked or dishonorable.
Example :
Black deeds.
A black lie.
His black heart has concocted yet another black deed.
Darth Vader of the dark side.
A dark purpose.
Dark undercurrents of ethnic hostility.
The scheme of some sinister intelligence bent on punishing him.
Meaning : On or starting from the wearer's left.
Example :
Bar sinister.