scary

Voyeurs are scary, but they are usually harmless.

it was scary the way they bonded with each other.

he may look scary, but people assure us he's really a pussycat.

The creatures themselves are veiny, scary, and bordering on the grotesque, with Satan-worthy roars.

Just be careful how you tell him—he’s got a very quick temper and he’s quite scary when he’s angry!