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doubtful
01
疑わしい, 不確かな
(of a person) uncertain or hesitant about something
Example
The student looked doubtful when asked if he understood the complex math problem.
He was doubtful about the success of the project, considering the tight deadline.
She felt doubtful about the sincerity of his apology, wondering if it was genuine.
02
疑わしい, あり得ない
improbable or unlikely to happen or be the case
Example
With no concrete evidence, it is doubtful that the jury will convict the defendant.
Given the poor weather conditions, it 's doubtful that the outdoor concert will take place as scheduled.
The team 's chances of winning the championship seem doubtful after their recent string of losses.
03
疑わしい, 不確かな
unsettled in mind or opinion
例
The student looked doubtful when asked if he understood the complex math problem.
He was doubtful about the success of the project, considering the tight deadline.
She felt doubtful about the sincerity of his apology, wondering if it was genuine.
He appeared doubtful about the reliability of the information he received.
She seemed doubtful about the decision, unsure if it was the right choice.
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