Rheumatocelis is a complex medical term that refers to inflammation of the synovial sheath of tendons. The word is derived from Greek roots "rheuma" meaning "discharge" and "kele" meaning "tendon". The spelling can be broken down phonetically as: /ru-mə-toh-seel-is/. The initial "rheu" sound is pronounced with a "r" sound followed by a "yoo" sound. The "to" sound is relatively straightforward, but the "celis" portion is pronounced with a hard "c" sound (like "k") followed by a "lee" sound and ending in an "is" sound.