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embrocation: embrocation: [15] The semantic notion underlying embrocation is of ‘wetness’, for it comes ultimately from the Greek word for ‘rain’, brokhé. This was the basis of a verb embrékhein, used for ‘treat medically by the application of liquid’, from which in turn was derived the noun embrokhé ‘lotion’. Latin took this over and in the Middle Ages formed a verb from it, embrocāre ‘treat with healing liquid’, which was actually borrowed into English as embrocate: ‘In wounds of gun-shot … embrocate often’, John Woodall, Surgion’s Mate 1612.

This had died out by the mid 19th century, but its noun, embrocation (used in the concrete sense ‘lotion’ since the 17th century), survives.
vet: vet: [19] Vet is short for veterinary surgeon. As a verb, it was originally used (in the 1890s) for ‘examine an animal medically’, but before the end of the 19th century this had broadened out to ‘investigate, screen’. Veterinary [18] itself came from Latin veterīnārius, a derivative of veterīnus ‘of cattle and similar domestic animals’.
cure (v.): late 14c., from Old French curer, from Latin curare "take care of," hence, in medical language, "treat medically, cure" (see cure (n.1)). In reference to fish, pork, etc., first recorded 1743. Related: Cured; curing.

Most words for "cure, heal" in European languages originally applied to the person being treated but now can be used with reference to the disease, too. Relatively few show an ancient connection to words for "physician;" typically they are connected instead to words for "make whole" or "tend to" or even "conjurer." French guérir (with Italian guarir, Old Spanish guarir) is from a Germanic verb stem also found in in Gothic warjan, Old English wearian "ward off, prevent, defend" (see warrant (n.)).
doctor (v.): 1590s, "to confer a degree on," from doctor (n.). Meaning "to treat medically" is from 1712; sense of "alter, disguise, falsify" is from 1774. Related: Doctored; doctoring.
-iatric: word-forming element from Greek iatrikos "healing," from iatros "physician, healer" (related to iatreun "treat medically," and iasthai "heal, treat"); of uncertain origin, perhaps from iaomai "to cure," related to iaino "heat, warm, cheer," probably from a root meaning "enliven, animate."
medical (adj.): 1640s, from French médical, from Late Latin medicalis "of a physician," from Latin medicus "physician, surgeon, medical man" (n.); "healing, madicinal" (adj.), from mederi "to heal, give medical attention to, cure," originally "know the best course for," from an early specialization of the PIE root *med- "to measure, limit, consider, advise, take appropriate measures" (cognates: Greek medomai "be mindful of," medein "to rule;" Avestan vi-mad- "physician;" Latin meditari "think or reflect on, consider;" Irish miduir "judge;" Old English metan "to measure out"); also see meditation. The earlier adjective in English in this sense was medicinal. Related: Medically.
therapeutic (adj.): pertaining to the healing of disease, 1640s, from Modern Latin therapeuticus "curing, healing," from Greek therapeutikos, from therapeutein "to cure, treat medically," primarily "do service, take care of, provide for," of unknown origin, related to therapon "attendant." Therapeutic was used from 1540s as a noun meaning "the branch of medicine concerned with treatment of disease." Related: Therapeutical (c. 1600).
therapy (n.): 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).