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

1.
assustador, aterrorizante
making someone afraid or anxious; terrifying.
:
•
The storm was truly frightening.
A tempestade era realmente assustadora.
•
It was a frightening experience.
Foi uma experiência assustadora.