spend: [OE] Spend is a blend of verbs from two distinct sources, but both going back ultimately to Latin pendere ‘weigh, pay’. The earlier was Latin expendere ‘pay out’ (later to give English expend [15]), which Old English took over as spendan. (It was also the source of German spenden.) This was later reinforced by dispend, a borrowing from Old French despendre which now survives only in dispense. => dispense, expend, pendant, pendulum[spend etymology, spend origin, 英语词源]