Spelling.School · How to spell
How to spell proof
Proof is spelled P-R-O-O-F.
What it means: Evidence that supports a claim.
In a sentence: We looked for proof that the cake was baked right.
The part people get wrong
Watch for double o.
Same family: prove, proven, proofreading, proofreader, evidence. If you can spell one, the shared part carries to the others.
Where it comes from: “Proof” comes from Old French “preuve,” meaning a test or trial, which in turn comes from Latin “probare,” meaning ‘to test’ or ‘to approve.’ This is also the origin of related words like “prove” and “probable.”
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