Meaning : Threatening or foreshadowing evil or tragic developments.
A baleful look.
His tone became menacing.
Ominous rumblings of discontent.
Sinister storm clouds.
A sinister smile.
His threatening behavior.
Ugly black clouds.
The situation became ugly.
Meaning : Stemming from evil characteristics or forces. Wicked or dishonorable.
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.
Sinister ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Sinister ka matlab kya hota hai?