The word "wimpest" is spelled with a silent "p," even though it may seem like the "p" should be pronounced. According to IPA phonetic transcription, the word is pronounced /ˈwɪmpɛst/. The "-est" ending indicates that it is a superlative form, meaning "most weak or indecisive." Although the spelling may seem odd or confusing, it is important to remember that English has many words with silent letters, and it is important to learn them in order to communicate effectively.