lanko.
brother-in-law (brother of one's spouse; husband of one's sibling)
Meaning & usage
brother-in-law (brother of one's spouse; husband of one's sibling)
Where this word comes from
From Proto-Finnic *lanko, borrowed from an unknown derivation of Proto-Germanic *langōną (whence Old English ġelangian, Old High German gilangōn). The original meaning was simply "relative", shifting into "relative by marriage, in-law" and finally "brother-in-law".
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.