keep calm
US /kiːp kɑːm/
UK /kiːp kɑːm/

1.
mantenere la calma, restare calmo
to remain relaxed and not get excited or worried
:
•
No matter what happens, just keep calm and carry on.
Qualunque cosa accada, mantieni la calma e vai avanti.
•
It's important to keep calm during an emergency.
È importante mantenere la calma durante un'emergenza.