The sinister voice on the other end of the telephone warned me to stop my investigation immediately.
The new Queen has a sinister plan to poison the King so that her son can take over the throne.
The villain laughed sinisterly as he tied the poor woman to the railroad
tracks.
Frodo and Sam were approaching the sinister lands of Mordor, where the Dark Lord ruled.
In the 1960s, the CIA apparently made a sinister plot to assassinate Cuban President Fidel Castro, using an exploding cigar.
The leader of the group was surrounded by huge,
sinister-looking thugs.
He is a sinister figure, like a Mafia hit man or something.
He is a sinister-looking fellow. I wouldn't trust him.
The dark clouds, and heavy rain falling outside both seemed to add to the sinister atmosphere in the old mansion.
The three
men are suspected of being involved in a sinister plot to kill the King.
The alien life forms in the movie were very sinister-looking creatures who were trying to take control of the earth.
The man received a sinister note warning that if he talked to the police about what he had seen, something unfortunate might happen.
The candidate says he simply wants to end immigration abuses, but I think he has a more sinister goal. I think he is racist and wants to stop non-white immigration to this country.
She loves to read mystery stories full of sinister characters and complex murder cases.
Hermann Hesse once remarked that people with courage and character always seem sinister to the rest.