запугивающий in English:

Don't worry. He may look intimidating at first glance, but he's actually a very friendly person.

She can be very intimidating when she's angry.

He knows his size has an intimidating effect on people.

We certainly weren’t friends with our teachers – we found them very intimidating.

intimidating something that makes you feel nervous

it's quite a fulfilling thing really. It's not competitive – it's quite easy to do and a bit less intimidating than a guitar...

Those are intimidating, right?

Some people find interview situations very intimidating.

These people are nicknamed the Dragons, and the intimidating room where they meet contestants.