Meanings
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1
adj
Unlikely or uncertain to happen or be true.
It is doubtful whether the rope will hold.
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2
adj
Feeling unsure or having doubts.
She looked doubtful about the plan but said nothing.
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3
adj
Possibly dishonest or of questionable quality.
The deal involved some people of rather doubtful character.
Thesaurus
Synonyms
Word family
Etymology
From Middle English doutfull, douteful, equivalent to doubt + -ful.
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