physiotherapy (n.)

word-forming element meaning "nature, natural, physical," from Greek physios "nature" (from PIE root *bheue- "to be, exist, grow").

1846, "medical treatment of disease," from Modern Latin therapia, from Greek therapeia "curing, healing, service done to the sick; a waiting on, service," from therapeuein "to cure, treat medically," literally "attend, do service, take care of" (see therapeutic).