Added 9 October 2026
brother-in-law
/ˈbɹʌðɚ ɪn ˌlɔ/ noun
In Latin: lēvir Wiktionary
noun Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about brother-in-law at Wordnik → Where our words come from →
Origin
From Middle English brother-in-lawe; equivalent to brother + -in-law.
From Wiktionary, via Kaikki.org (CC BY-SA)