Is it farther or further?
late 14c., from Old French reumatique (Modern French rhumatique), from Latin rheumaticus "troubled with rheum," from Greek rheumatikos, from rheuma "discharge from the body" (see rheum).
rheumatic rheu·mat·ic (rōō-māt'ĭk)adj. Relating to or characterized by rheumatism. n. One who is affected by rheumatism.