Meaning

noun one related by blood or origin; especially on sharing an ancestor with another

noun a word is cognate with another if both derive from the same word in an ancestral language

adjective related in nature

originBorrowed from Latin cognātus (“related by blood”), from co- + gnātus (“born”). Compare Portuguese cognato and Spanish cognado. Doublet of connate and cognatus.

Etymology from Wiktionary, CC BY-SA 3.0