length: [OE] Length was coined in the prehistoric Germanic period from the adjective *langgaz (source of English long) and the abstract noun suffix *-ithō. The resultant *langgithō has subsequently diversified to Dutch lengte, Swedish längd, Danish længde, and English length. (German has plumped for the different noun derivative länge ‘length’, whose English relative lenge ‘length’ survived until the 17th century.) => long[length etymology, length origin, 英语词源]