Scary (adjective)

1. Causing fear or alarm; frightening.
2. Intimidating or inspiring awe or reverence.
3. Evoking fear or nervousness.

Origin:

Mid 19th century: alteration of scare + -y.

Examples:

1. The horror movie was full of scary scenes that kept the audience on the edge of their seats.
2. The dark and stormy night was scary and made her feel uneasy.
3. The old abandoned house was scary and many people thought it was haunted.
4. The thought of speaking in public was scary for the young man.
5. The high speed chase was scary and everyone feared for their lives.