Meaning : The state of being unsure of something.
Synonyms : doubt, dubiety, dubiousness, incertitude, uncertainty
Meaning : Uncertainty about the truth or factuality or existence of something.
Example :
The dubiousness of his claim.
There is no question about the validity of the enterprise.
Synonyms : doubt, dubiousness, question
Doubtfulness ka meaning, vilom shabd, paryayvachi aur samanarthi shabd in Hindi. Doubtfulness ka matlab kya hota hai?