adjective Date: 14th century giving rise to doubt ; open to question , 2. lacking a definite opinion, conviction, or determination , uncertain in outcome ; undecided , marked by qualities that raise doubts about worth, honesty, or validity , ~ly adverb ~ness noun Synonyms: see: ~
DOUBTFUL
Meaning of DOUBTFUL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012