1.reinforce v.加強(to strengthen);補充(to strengthen by additional assistance, material)

詞根記憶：re（再）+inforce(強化)——加強

例：In birds, these hollow bones are reinforced more massively by internal struts.

2.reinvest v.再授給(to invest in additional securities);再投資(to invest again or anew)

詞根記憶：re（再）+invest（投資）——再投資

例：The profits may be reinvested to increase economic growth through eco efficiency.

3.reject v.拒絕，抵制(to refuse)

詞根記憶：re（反）+ject（扔）——被扔回來——拒絕

例：Recently a court ruled that current law allows companies to reject a job applicant if working in the job would entail a 90 percent chance that the applicant would suffer a heart attack.

同根詞：object（v.反對；n．目標）

4.rejection v.拋棄：拒絕(the action of rejecting)；被拋棄的東西(sth．rejected)

詞根記憶：來自rejecl（v.拒絕）

例：The first presents a goal that the argument rejects as ill-conceived ;the second is evidence that is presented as grounds for that rejection.

同根詞：ejection（n．噴出；排出物）

5.rekindle v.重新激起(to cause Sth．to light again)

詞根記憶：re（重新）+kindle（點燃）——重燃——重新激起

例：He is trying to rekindle pride in his compatriots．

6.rolative n.親戚（a person connected with another by blood or affinity）；a．相對的：相關的(not absolute or independent)

詞根記憶：來自relate（v.相關，關系）

例：Once introduced into southern Europe ,maize became popular with landowners because of b high yields relative to other Cereal Crops.

派生詞：relatively（ad．相對地）

同根詞：relation（n.關系）

7.relativity n.相對論(Einstein's theory of the universe which shows that all motion is relative and treats time as a fourth dimension related to space)

例：general relativity廣義相對論

8.relay v.中繼轉(zhuǎn)發(fā)，轉(zhuǎn)播(to broadcast sth. by passing signals through a transmitting station)

例：Robot satellites relay important communications and identify weather patterns.

9.release v./n.排放(to send out);發(fā)表（布）(to make available to the public)；解放，釋放(to set free from restraint, confinement, or servitude)

詞根記憶：re（一再）+lease(松弛，放松)——解放，釋放

例：The release of the iron compounds did not increase the supply of nitrogen compounds in the area.