How Do You Spell PROOFPROOF?
Pronunciation: [pɹˈuːfpɹuːf] (IPA) 
The spelling of the word "Proofproof" is simple to understand with the help of the International Phonetic Alphabet (IPA) transcriptions. The first syllable of the word is 'pruf', pronounced as [pruːf], with a long 'u' sound followed by the consonant 'f'. The second syllable 'proof' has the same spelling and pronunciation as the first syllable. So, the double 'proof' spells as [pruːfpruːf], meaning an evidence or confirmation that is repeated or validated twice.
