Correct spelling for the English word "proofest" is [pɹˈuːfəst], [pɹˈuːfəst], [p_ɹ_ˈuː_f_ə_s_t] (IPA phonetic alphabet).
The word "proofest" is formed by adding the suffix "-est" to the word "proof".
The etymology of "proof" can be traced back to the Latin word "probare", meaning "to test or prove". In Old French, the word "preuve" emerged, which further evolved into Middle English as "preove". Over time, "preove" transformed to "proof" in Modern English, still retaining the meaning of evidence or demonstration.
Adding the suffix "-est" to "proof" results in "proofest", which is the superlative form of the word, indicating the highest level or most extreme degree of proof.