the.com/anesthesia

means the medically induced loss of sensation or awareness, used to spare a patient pain during surgery or procedures.

from From Greek anaisthēsia, "want of feeling," stitched together from an- ("without") and aisthēsis ("sensation, perception") — the same aisthēsis that underlies "aesthetic." So the aesthete who delights in sensation and the patient who is spared it are linguistic opposites built from the same root. The word existed in Greek for plain numbness, but its modern surgical sense was famously christened in the mid-19th century by physician-poet Oliver Wendell Holmes, who suggested it to name the new ether-induced sleep.