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doubtful
01
(of a person) uncertain or hesitant about something
Examples
He appeared doubtful about the reliability of the information he received.
02
improbable or unlikely to happen or be the case
Examples
Given the poor weather conditions, it 's doubtful that the outdoor concert will take place as scheduled.
03
not clearly known or proven
Examples
The results of the experiment are doubtful due to inconsistent data.
Lexical Tree
doubtfully
doubtfulness
doubtful
doubt
