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Etymology

From Middle English sinne, synne, sunne, zen, from Old English synn ("sin"), from Proto-West Germanic *sunnju, from Proto-Germanic *sunjō ('truth', 'excuse') and *sundī, *sundijō ("sin"), from Proto-Indo-European *h₁s-ónt-ih₂, from *h₁sónts ("being, true", implying a verdict of "truly guilty" against an accusation or charge), from *h₁es- ("to be"); compare Old English sōþ ("true"; see sooth). Doublet of suttee.