sinister

They often have a sinister gray or red color, with warts and scales reminiscent of the toxic fungi in fairy-tale illustrations.

They were, however, assured that he lingered in the city and was sinisterly alive.

When he spoke—which was often—his speech slid sinisterly out of the extreme left corner of his mouth.

Of all these, Smith is, to the nation now, of most importance—and sinisterly so.

He ascends a horse somewhat sinisterly, though not on the left side, and they both go jogging in grief together.

When Macbeth announces, “Duncan comes here to-night,” she asks sinisterly, “And when goes hence?”