penny: [OE] Penny comes from a prehistoric Germanic *panninggaz, which also produced German pfennig and Dutch and Swedish penning. It has been speculated that this was derived from *pand- ‘pledge, security’, which also produced English pawn – in which case it would denote etymologically a ‘coin used in transactions involving the pledging of a sum as security’. => pawn[penny etymology, penny origin, 英语词源]