The phrase "a sinister side" is correct and usable in written English.
It can be used to describe a darker, more malevolent aspect of a person, situation, or concept.
Example: "While the town appeared charming at first glance, it had a sinister side that revealed itself through its dark history."
Alternatives: "a dark aspect" or "an ominous facet".
It has to be said, however, that these humble machines do have a sinister side.
But it also has a sinister side, and not only because Olson is now Solicitor General of the United States.
The cases have exposed a sinister side of Thailand's surrogacy business, which attracts couples from all over the world who are unable to conceive naturally.
Reports of skyrocketing interest rates and suicides among indebted borrowers in Andhra Pradesh, India, suggested a sinister side to the microcredit boom.
Forget Ronald McDonald and Michael Jackson in full makeup and a strange wig – now there's a sinister side to the proceedings.
In addition to Searching and Fresh, the 90s saw a spate of substandard crime thrillers, each seeking to portray a sinister side to chess.
But as officials in Utah learned this week, recent gatherings have also had a more sinister side, attracting a seedier crowd that uses all the anachronistic peace-loving as cover for drug abuse, theft and violent crime.
But as officials in Utah learned this week, recent gatherings have also had a more sinister side, attracting a seedier crowd that uses all the anachronistic peace-loving as cover for drug abuse, theft, and violent crime.
Paou plays Michel, a handsome and charismatic man – with an extremely sinister side – who meets Franck, a younger man, at a cruising spot.
The series showed a more sinister side of the West Indies, with a riot occurring in the drawn second Test and the English team being attacked at the conclusion of the final Test.
But there was a more sinister side to the country, and it disturbed an ambitious Tory journalist in his early 30s named Henry Fairlie.
