The spelling of the word "jadest" can be a bit confusing at first glance. The word is actually the superlative form of "jade," which means to make tired or weary. The unusual spelling is due to the combination of the -ed suffix and the silent -st ending, which is used to indicate the superlative form. In IPA phonetic transcription, the word is pronounced as /ˈdʒeɪdɪst/, with the stress on the first syllable.