uncertain
US /ʌnˈsɝː.tən/
UK /ʌnˈsɝː.tən/

1.
2.
incerto, dubbioso
feeling doubt about something; not sure
:
•
She was uncertain about her decision.
Era incerta sulla sua decisione.
•
I'm uncertain if I locked the door.
Sono incerto se ho chiuso la porta a chiave.