cognate

The definition of cognate is related by birth.

(adjective)

An example of cognate is the relationship between two siblings.

See cognate in Webster's New World College Dictionary

adjective

related by family; having the same ancestor
having the same nature or quality
Linguis. related through the same source; derived from a common original form: English apple and German apfel are cognate words; English and Flemish are cognate languages

Origin: L cognatus, related by birth < co-, together + gnatus, pp. of gnasci, older form of nasci, to be born: see genus

noun

1. a person related to another through common ancestry
2. a relative on the mother's side
a cognate word, language, or thing

See cognate in American Heritage Dictionary 4

adjective

Related by blood; having a common ancestor.
Related in origin, as certain words in genetically related languages descended from the same ancestral root; for example, English name and Latin nōmen from Indo-European *nō̆-men-.
Related or analogous in nature, character, or function.

noun