frightening
US /ˈfraɪ.tən.ɪŋ/
UK /ˈfraɪ.tən.ɪŋ/

1.
spaventoso, terrificante
making someone afraid or anxious; terrifying.
:
•
The storm was truly frightening.
La tempesta era davvero spaventosa.
•
It was a frightening experience.
È stata un'esperienza spaventosa.