1. [望文生义]根据所学词根的知识推测下列单词的词义。
① unconfined a.
② undefined a.
2. [同义相连]将左栏中的单词和右栏中相对应的词义连接起来。
① indefinable a.不明确的
② indefinite b.无限的
③ infinite c.难下定义的
④ infinitive d.动词不定式
3. [词义辨析]选择最恰当的词义。
① finale n. A.终场 B.完成 C.决赛
② finis n. A.结尾 B.完成 C.精致
③ finial n. A.顶部装饰物 B.戏剧终场 C.决赛场
4. [寻根问底]指出下列单词的词根并领会其词义的由来。
① refine v.提纯；精制
refinement n.精制；精致
② infinitesimal a. [数]无穷的 n.无穷小
③ infinitude n.无限
④ superfine a.精致的；过于精细的
34. flu, flux [L]=to flow流动
常用词fluid，fluent，influence，influenza等，都是词根flu的派生词。flu来自拉丁动词fluere，意思是to flow（流动）。flu有个异形根flux，它来自动名词fluxum的词干部分。
fluid [flu=to flow流；-id a.=having the quality有……性质的→“having the quality of flowing有流动性质的”→]Ⅰa. able to flow流动的：fluid mechanics流体力学→Ⅱn. substance that flows;gas or liquid流体；气体；液体：Water is a kind of fluid.水是一种流体。
▽fluidity [fluid;-ity n.] n.流动性；流质；液态
fluidify [fluid;-ify v.] v.使成流体
fluent [flu=to flow流；-ent a.=-ing有……性质的→] a. flowing easily流畅的：She can speak fluent English.她能说一口流利的英语。
▽fluency [flu;-ency n.] n.流畅；流利
influence [in-=into进入；flu=to flow流；-ence n.=the act or result表行为结果→“a planet's flowing into some area, which was supposed to work on other planets某行星流入某方位，古时候认为这对其他行星有所影响”→]Ⅰn. the power to produce effects on others影响力：I have no influence to his decision. 我无法影响他的决定。→Ⅱv. produce effects on影响：Bad weather influenced the grain production.坏天气影响了粮食生产。
▽influential [in-;flu;-ent;-ial a.] a.有影响的
influenza [influenz=to influence影响；-a n.=disease疾病→“disease that influences many people at a time 同时影响许多人的疾病”→] n. epidemic virus disease attacking the upper respiratory tract流行性感冒（侵染上呼吸道的病毒性流行病）
affluent [af-(ad-)=to向；flu=to flow流；-ent a.=-ing……的→“flowing freely to向……涌流而来的”→] a. abundant;wealthy丰富的；富裕的：affluent society富裕的社会
▽affluence [af-;flu;-ence n.] n.丰富；富裕
confluence [con-(com-)=together共；flu=to flow流；-ence n.=the state表状态→] n. flowing of water together with another汇流，汇合/a city at the confluence of two rivers两河交汇处的城市
▽confluent [con-;flu;-ent a.] a.合流的；汇合的
influent [in-=into 入；flu=to flow 流；-ent a.=-ing ……的→] Ⅰa. flowing into流入的：influent water from a lake从湖泊流进的水→Ⅱn. tributary stream支流
effluent [ef-(ex-)=out出；flu=to flow流；-ent a.=-ing……的→]Ⅰa. flowing out流出的：an effluent stream from a lake湖泊流出的支流→Ⅱn. stream flowing from a large stream, lake, etc.从河、湖等出来的水流：the effluent from a chemical factory从化工厂流出来的废水
▽effluence [ef-;flu;-ence n.] n.流出；（光、电等）射出
refluent [re-=back回；flu=to flow流；-ent a.=-ing……的→] a. flowing back;ebbing逆流的；退潮的：the refluent tide退潮
▽refluence/refluency [re-;flu;-ence/-ency n.] n.逆流；退潮
superfluous [super-=beyond超出；flu=to flow流；-ous a.=having the quality有……性质的→“having the quality of flowing beyond or over流过界的”→] a. overflowing;above what is enough过剩的；多余的：superfluous remarks多余的话
▽superfluity [super-;flu;-ity n.] n.多余；奢侈
