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co-in-law

From Wiktionary, the free dictionary

English

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Etymology

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The usage comes from the reciprocal relationship of the two people separating the people in question, such as two men who are each father-in-law to one of the parents of their grandchildren.

Pronunciation

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Noun

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co-in-law (plural co-in-laws)

  1. (rare) A distant in-law: A relationship by marriage with a separation by three degrees (two people), compared to prototypical in-laws, where the separation is two/one. The separation may be two degrees of blood kin and one of marriage (addressing the mother of the husband of one's daughter), or one degree blood and two of marriage (addressing the brother-in-law of one's brother, or, similarly, addressing the wife of the brother of one's husband).
    My co-in-law and I took our granddaughter to the zoo. [= co-parent-in-law]
    • 2006, Ernest S. Burch, Jr., Social Life in Northwest Alaska: The Structure of Iñupiaq Eskimo Nations, page 94:
      the co-in-law, or aŋayunġuq-nukaunġuq relationship, which involved people who married siblings [= co-sibling-in-law]

Usage notes

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Depending on context, the term may be understood to mean specifically co-sibling-in-law, or co-parent-in-law.

Synonyms

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Also,