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feeling uncertain about something; not sure.
I'm doubtful that the meeting will happen tomorrow.
I don't think the meeting will occur tomorrow.
He gave a doubtful reply to her question.
His answer suggested he didn't fully believe or trust the situation.
Often implies a lack of confidence or trust in the truthfulness or reliability of something.
causing or likely to cause doubt; questionable.
The evidence was doubtful and couldn't be trusted.
The proof provided was unreliable and suspicious.
Used to describe something that raises suspicion or is not credible.
Avoid using 'doubtful' to mean 'feeling sad' or 'disappointed'. It specifically relates to uncertainty or suspicion, not emotions like sadness.
'Doubtful' often carries a negative connotation, implying that something is not trustworthy or is likely to fail.
From Middle English 'doutful', from Old English 'doubt' (uncertainty) + '-ful' (suffix meaning 'full of'). The word evolved from Latin 'dubitare' (to doubt) and entered English via Old French 'douter'.
Used to express skepticism or lack of conviction. Common in both spoken and written English, particularly in contexts where evidence or reliability is questioned.