frighten
US /ˈfraɪ.tən/
UK /ˈfraɪ.tən/

1.
assustar, amedrontar
make (someone) afraid or anxious
:
•
The sudden noise frightened the baby.
O barulho repentino assustou o bebê.
•
Don't let his threats frighten you.
Não deixe que as ameaças dele te assustem.