The word "arthrempyesis" represents a medical condition that refers to the drainage of pus from a joint. Spelt as /ɑːθɹɛmˌpaɪiːsɪs/, the word consists of several components. "Arthro-" refers to joint, "empyema" to pus, and "-esis" to the process or condition. The spelling of this word can seem daunting to some, but it follows the conventions of medical terminology, where Latin or Greek root words are often combined to form complex terms. Understanding the phonetic transcription can help with correct pronunciation and spelling.
The presence of pus in a joint.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.