doubtful
US /ˈdaʊt.fəl/
UK /ˈdaʊt.fəl/

1.
ragu, tidak yakin
feeling uncertain about something
:
•
I'm doubtful about his ability to finish the project on time.
Saya ragu tentang kemampuannya menyelesaikan proyek tepat waktu.
•
She gave a doubtful look when he explained his plan.
Dia memberikan tatapan ragu ketika dia menjelaskan rencananya.
2.
diragukan, tidak mungkin
unlikely to be true or to happen
:
•
It's doubtful that they will agree to our terms.
Diragukan bahwa mereka akan menyetujui persyaratan kita.
•
The success of the mission remains doubtful.
Keberhasilan misi tetap diragukan.