The word proof is both a noun and a verb.
Proof (as in evidence, or as in a final draft before printing of a photo or book) is a noun.
The corresponding verb is to prove.
Proof may be a verb, proof, meaning 'to test, to examine for flaws.'
In baking, it means 'to cause dough to rise.'
In printing, it means 'to make a trial impression' or 'to proofread.'
Examples:
Noun: For some people, if it's in a blog, that's proof that it's true.
Verb: More people should proof their emails and texts before they hit send.
The word proof is a noun, as in, I need proof before I can reach a verdict. It is sometimes used as an adjective as well, when coin collectors describe the condition of a coin (proof means perfect condition). It has another adjective meaning as well. It is used to label Alcoholic Beverages and is exactly one twice of the alcohol content of the veverage, thus a vodka which is 50% alcohol would be labelled 100 proof (which is very strong).
part of speech
Adjective
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part of speech
The part of speech for this particular word is a noun.
The word "allegation" is a noun. It refers to a claim or assertion that someone has done something wrong or illegal without providing proof.
adverb
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The part of speech for "answer" is a noun.
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The part of speech for "unfamiliar" is an adjective.
The part of speech for "indefinite" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "breezy" is an adjective.
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