1.overcharge v.过度充电；索价过高，收费过高(to charge too much)

词根记忆：over(过度)+charge(收费)--收费过高

例：Many clients had been overcharged.

2.overextend v.过度扩展(to extend or expand beyond a safe or reasonable point)；使冒过大风险

词根记忆：over(过度的)+extend(扩展)--过度扩展

例：The speculative fever of the Roaring Twenties infected rich and poor alike; vast quantities of people were dangerously overextended.

3.overfish v.过度捕捞( to fish to the detriment of(a fishing ground) or to the depletion of(a kind of organism))

词根记忆：over(过度的)+fish(捕鱼)--过度捕捞

例：There are no legal limits, as there are for cod and haddock, on the size of monkfish that can be caught , a circumstance that contributes to their depletion through overfishing.

4.overflow v．溢出(to fill a space and spread beyond its limits)

词根记忆：over(超过)+flow(流)---流出--溢出

例：If the county continues to collect residential trash at current levels, landfills will soon be overflowing.

5.overlap v.重叠(to occupy the same area in part)

词根记忆：over(在…上)+lap（大腿--把一条腿放在另一条腿上--重叠

例：Each language occupies a distinct area of the brain in an adult learner, while language areas overlap in a young child.

6.overlay v.覆盖(to cover)

例：These seas have a typical oceanic floor, except that the floor is overlaid by several kilometers of sediment.

7.overlie v.躺（伏）在…上面(to lie over or upon)

例：The blacksmith overlay wood with silver.

8.overlook v.忽略，忽视(to neglect, to ignore)

例：They have overlooked the role that women's political activities played in the woman's rights movement.

9.overlord n.最高领主(a lord over other lords)

词根记忆：over(超过)+lord(领主)--领主上面的领主--最高领主

例：In the 18th century, Japan's feudal overlords found themselves under financial stress.