The spelling of the word "ghostest" is not common in English. It is an archaic superlative form of "ghost," meaning it denotes the highest degree of ghostly activity. In IPA phonetic transcription, "ghostest" is written as /ˈɡoʊstəst/. Here, the stress is on the first syllable /ˈɡoʊst/ and the schwa sound /ə/ is used to indicate the unstressed vowel. The final two consonants /st/ represent the superlative suffix. Despite its rarity, "ghostest" is still used occasionally in literature or poetry.