The word "essick" does not appear to have a commonly recognized definition, and its spelling is not immediately clear from its pronunciation. In IPA phonetic transcription, it could be spelled as /ˈɛsɪk/ or /ˈɛsɪkə/. The first phonetic transcription represents a two-syllable word with stress on the first syllable and ending in the sound "ick". The second phonetic transcription represents a three-syllable word with stress on the second syllable and ending in a schwa sound. Without further context or information, it is difficult to determine the intended spelling of the word "essick".