Is it ensure, insure, or assure?
1610s, from Medieval Latin Hippocraticus, pertaining to Hippocrates (c.460-377 B.C.E.), the famous ancient Greek physician. Hippocratic Oath is attested from 1747; it is in the spirit of Hippocrates but was not written by him. The name is literally "one superior in horses."
Hippocrates Hip·poc·ra·tes (hĭ-pŏk'rə-tēz'), Called “the Father of Medicine.”. 460?-377? b.c.
Greek physician who laid the foundations of scientific medicine by freeing medical study from the constraints of philosophical speculation and superstition. He is traditionally but inaccurately considered the author of the Hippocratic oath.
An ancient Greek physician (the “father of medicine”) who is credited with founding the study of medicine.