名詞 cognate:

1. one related by blood or origin; especially on sharing an ancestor with another
   同義詞：blood relation, blood relative, sib
2. a word is cognate with another if both derive from the same word in an ancestral language
   同義詞：cognate word

形容詞 cognate:

1. related in nature
   同義詞：connate
2. having the same ancestral language
3. related by blood
   同義詞：akin, blood-related, consanguine, consanguineous, consanguineal, kin

1. The German word `Haus' is cognate with the English word `house'.
   德語的Haus一詞和英語的house一詞同源。
2. Physics and astronomy are cognate sciences.
   物理學(xué)和天文學(xué)是相關(guān)聯(lián)的科學(xué)。
3. German and Dutch are cognate languages.
   德語和荷蘭語為同源語言。

cog.nate

adj.Abbr. cog.（形容詞）縮寫 cog.
Related by blood; having a common ancestor.
同族的：有血緣關(guān)系的；有共同祖先的
Related in origin, as certain words in genetically related languages descended from the same ancestral root; for example, Englishname and Latin nômen from Indo-European nò-men- .
同詞源的：來源相關(guān)的，如在有關(guān)的語言中，一些詞來自相同的詞根；例如，英語name 與拉丁文 nomen 源自印歐語 no-men-
Related or analogous in nature, character, or function.
相關(guān)的：在性質(zhì)、特征或功能上有關(guān)或類似的
n.（名詞）
One related by blood or origin with another, especially a person sharing an ancestor with another.
具血親關(guān)系者：與另一個(gè)人的血緣或來源相關(guān)的人，尤指與別人有共同祖先的人
A word related to one in another language.
同字源的字：與另一種語言的一個(gè)詞有關(guān)的一個(gè)詞

來源：
Latin cogn3tus
拉丁語 cogn3tus
co- [co-]
co- [前綴，表.相互，一起.]
gn3tus [born] [past participle of] n3sco [to be born] * see gen…-
gn3tus [生來的] [] n3sco的過去分詞 [出身于…的] *參見 gen…-

【引伸】
cogna.tion
n.（名詞）