Doubtful : implies little more than a lack of conviction or certainty Eg: doubtful about whether I said the right thing>.
Dubious : stresses suspicion, mistrust, or hesitation <dubious about the practicality of the scheme
"Dubious" typically implies uncertainty or suspicion about something, while "doubtful" suggests a lack of certainty or belief in something. "Dubious" is often used to convey a sense of skepticism or distrust, while "doubtful" is more about expressing uncertainty or hesitation.
Dubious means hesitating or doubtful, questionable in terms of validity or truth.
Doubtful is an adjective; it describes something that is in doubt (noun) or something you doubt (verb). Example uses: Adjective: The doubtful weather makes it difficult to decide if we should go today. Noun: My doubt about his ability was proven wrong by his results. Verb: We don't have much cake left, I doubt there is enough to serve guests. You can tell it is not a verb because it is impossible to put the preposition "to" in front of it in order to create an infinitive verb, i.e. "to doubtful", or to use it in a sentence such as "I doubtful something". It also cannot be a noun because you cannot put "the" or "a" in front of it and use it in a sentence like "I see the doubtful" or "Can I have a doubtful?" "Doubtful", as an adjective, means that it can be used either as an attribute, describing something ("The painting was of doubtful origin") or as a predicate adjective which usually appears alone after a verb ("I am doubtful" or "she is feeling doubtful"). "Doubtful" is probably most commonly used in this second way, as a predicate adjective. As an attribute, other words such as "dubious" (which is related to the word "doubt") are more often used.
He gave a dubious explanation for his absence from the meeting, raising suspicions among his colleagues.
(dubious means of uncertain truth or validity)Examples :The validity of the document was somewhat dubious.I was rather dubious about the reasons he gave for his absence.
The sentence "Is this, the child dubiously asked, a question?" more clearly conveys that the child is asking the question with doubt. Placing "the child dubiously asked" between commas helps to set it apart as the action performed by the child.
Dubious means hesitating or doubtful, questionable in terms of validity or truth.
dubious means doubtful
Dubious
Doubtful, dubious or incredible
ambiguous, dubious, unclear, indecisive
(adj.) - skeptical; questionable Doubtful.
Questionable honesty and ethics.
unsure, doubtful or dubious, uncertain, hesitant.
Doubtful, specious, skeptical
doubtful, suspicious, dubious, unsure, uncertain
His mother was dubious that he had already cleaned his room.He lost the debate because his argument was made up of dubious "facts."
This is doubtful, or dubious; yet the opposite is a certainty.