ancestor vs basic form

ancestor

• A word or phrase which serves as the origin of a term in another language. 

• One who had the same role or function in former times. 

• One from whom an estate has descended;—the correlative of heir. 

• One from whom a person is descended, whether on the father's or mother's side, at any distance of time; a progenitor; a forefather. 

• An earlier type; a progenitor 

• To be an ancestor of. 

basic form

• The uninflected form of a word used as a dictionary entry.