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"doubtful" does not have a prefix. It does, however, have a suffix ('-ful').

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john42john42

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What is the prefix for doubtful?

The prefix for doubtful is "un-."


What is the root word of doubtful?

The root word of doubtful is "doubt."


How can you use the word douptful?

You can use the word "doubtful" to express uncertainty or skepticism about something. For example, "It is doubtful that we will finish the project on time," or "She gave a doubtful look at the new proposal."


What is the definition of dubious?

Dubious means hesitating or doubtful, questionable in terms of validity or truth.


Is doubtful a verb or a noun?

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.