sin: [OE] Sin comes from a prehistoric Germanic *sunjō, a close relative of which produced German sünde, Dutch zonde, and Swedish and Danish synd ‘sin’. It is not altogether clear what its ultimate origins were, but it has been linked with Latin sōns ‘guilty’, and also with English sooth ‘truth’ and Sanskrit satya- ‘real, true’, as if its ancestral meaning were ‘(truly) guilty’. [sin etymology, sin origin, 英语词源]