1.recourse n.(to)求助；依靠(a turning to sb. or sth. for help or protection)

例：Police was his last recourse.

2.recover v.恢复(to get back)
词根记忆：re(再，重新)+cover(遮盖)--恢复
例：Most victims of infectious mononucleosis recover after a few weeks of listlessness, but an unlucky few may suffer for years.
派生词：recovery(n．恢复，痊愈)

同根词：uncover(v.发现，揭露)

3.recreation n．娱乐活动，消遣(refreshment)
词根记忆：来自recreate(v.娱乐)

例：The new residents do not need to travel into Lamberton regularly for shopping or recreation.

4.recreational a．娱乐的(of, relating to, or characteristic of recreation)
词根记忆：来自recreate(v.娱乐)

例：Many Milville residents object to having to pay fees for recreational use of the park in the winter.

5.recruit n.新成员(a newcomer to a field or activity)：v.招收(to engage, to hire)
联想记忆：re（重新）+cruit(=cres成长)--重新成长--新成员
例：We have had only marginal success in recruiting and training high-quality professional staff.

派生词：recruiter(n.征兵人员)

6.rectangle n.长方形，矩形(a parallelogram all of whose angles are right angles)
词根记忆：rect(直)+angle(角)--每个角均为直角的四边形--长方形
例：The three small rectangles have the same dimensions.

派生词：rectangular(a．长方形的)

7.recur v.再发生(to happen again)；重新提起（ to come up again for consideration）
词根记忆：re(重新)+cur(=run跑)--跑回来--再发生
例：A migraine afflicts one side of the head, and may recur as infrequently as once every other month, or as often as daily.

派生词：recurrent(a．反复出现的：再发生的)

8.redirect v.改寄(信件)(to send in a new direction)；改变方向(to change the course or direction of)
词根记忆：re（重新）+direct(指向)--改变方向

例：The Chicago and Calumet Rivers, originally flowing into the St. Lawrence by way of Lake Michigan, have been redirected through the construction of canals so that the water now empties into the Mississippi by way of the Illinois River.

9.redress v.改正(to correct)；调整（to set right）
联想记忆：re(重新)+dress(穿衣，整理)--重新整理--改正
例：It is not likely that the competitive imbalance will be redressed during the foreseeable future.