"Fraudest" is not a commonly used word in modern English. It is a variant form of the verb "defraud," meaning to deceive or cheat someone. The spelling of "fraudest" follows the regular conjugation pattern of -est for the second person singular present tense of verbs ending in -aud. The IPA phonetic transcription of "fraudest" is /frɔːdɛst/. While "fraudest" may be technically correct, it is not commonly used, and the standard spelling is "defrauds."
The word fraudest is not found in the English language. It appears to be a misspelling or a combination of the words fraud and the second person singular form of the verb to be in the past tense, which is were.