etymon: a simple form inferred as the common basis from which related words in several languages can be derived by linguistic processes
form: the phonological or orthographic sound or appearance of a word that can be used to describe or identify something
eskimo: a member of a people inhabiting the Arctic (northern Canada or Greenland or Alaska or eastern Siberia); the Algonquians called them Eskimo (`eaters of raw flesh') but they call themselves the Inuit (`the people')