Plum Island doesn't look all that sinister from here, a mile across open water.

Below him the long black shape of the Manta looked sinister and dangerous.

The fellow looked sinister enough, and anxious, having lost Mallory in the crowd for the time being.

"They looked incredibly sinister in the half light," he noted.

I turned around and saw Vesuvius; it had never looked more sinister.

She also said the events of Aug. 8 looked more sinister in retrospect than they did at the time.

Even from behind, his tall, slim body looked slightly sinister.

It couldn't have looked more sinister if it had tried.

Naturally dark of skin, gloom made him look slightly sinister.

"Nothing looks sinister or suspicious around here," he thought.