1.overpayment n.多付的款额(the overpaid fund)

例：The investigators were unable to determine the extent of possible earlier overpayments.

2.overrun n．泛滥，超出限度(an exceeding of the costs estimated in a contract for development and manufacture of new equipment)

词根记忆：来自词组run over(泛滥)

例：Overstocks may accumulate through production overruns or errors.

3. overstock v./n.库存过剩（to stock more than necessary or desirable）

例：The distributors' ordering more goods in the summer quarter left them overstocked for the fall quarter.

4.oversupply v．过多供给(to supply with an excess of);n.供给过多(the quality of being so overabundant that prices fall)

分拆记忆：over(过多)+supply(供应)--过多供给

例：An oversupply of computer chips has sent prices plunging.

同根词：supplier(n.供应商：供应者)

5.overt a．公开的，非秘密的(open)

词根记忆：o（出）+vert(转)--转出来--公开的

例：Economies of nonsocialist countries employ intentional price-fixing(价格限定)．usually in an overt fashion.

6.overview n．概观，概述(summar3t)

例：Methods widely used today include analysis of aerial images that yield a broad geological overview.

7.overwhelm v.淹没(to submerge)；压倒(to overcome by superior force or numbers)；（使）不知所措（to affect deeply in mind or emotion）

词根记忆：over(在…上)+whelm(淹没，压倒)--淹没；压倒

例：People are overwhelmed by the increasing amount of information available on the computer. // The horrible scene of the film overwhelmed the audience.

派生词：overwhelming(a．势不可挡的)

8.overwhelming a．压倒性的(very great or very strong)；势不可挡的(so powerful that you cannot resist it or decide how to react)

词根记忆：over(胜过)+whelm(淹没，覆盖)+ing--压倒性的

例：The overwhelming majority were quite satisfied with them.

派生词：overwhelmingly( ad.压倒性地：势不可挡地)

同根词：overwhelm(v.压倒；淹没)

9.ovulate v.排卵，产卵(to produce ova; discharge eggs from the ovary)

例：Some adult female mole rats neither ovulate nor breed.