One of a number of things allied in origin or nature.
A word either descended from the same base word of the same ancestor language as the given word, or strongly believed to be a regular reflex of the same reconstructed root of proto-language as the given word.
Allied by blood; kindred by birth; specifically (law) related on the mother's side.
Of the same or a similar nature; of the same family; proceeding from the same stock or root.
Descended from the same source lexemes (same etymons) of an ancestor language.