1. [举一反三]根据已知单词的词义推断出其同根词的词义。
local地方的→① localism n.
→② localize v.
→③ localization n.
2. [由此及彼]根据已知单词的词义推断出其同根词的词义。
① locate v.定位→mislocate v.
② location n.定位→radiolocation n.
③ automobile n.汽车→locomobile n.
3. [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 locative a.位于中间；居中
② interlocate b.改变位置；易位
③ locus c. [语法]位置格的
④ translocation d.脱臼；混乱
⑤ dislocation e.地点；所在地
4. [节外生枝] loc有个来自法语的异体low，主要的同根词有：
① allow n.允许；准许；许可
② allowable a.允许的；准许的；许可的
③ allowance n.允给额，分配额；津贴；补贴
52. log, logue [GK]=speech, reason说话，推理
在常用词logic，dialogue，apologize和eulogy中，词根log来源于希腊名词logos，原意相当于speech或reason,即“说话”或说话中的“推理”。异形词根logue是log在词尾时的拼写形式。
logic [log=reason推理；-ic n.=the science or art of……学→] n. the science and art of reasoning correctly逻辑学（正确推理的科学）：He argued with learning and logic.他的辩论既有学问又合逻辑。
▽logical [logic;-al a.] a.逻辑的；符合逻辑的
logician [logic;-ian n.] n.逻辑学家
dialogue [dia-=between 在……之间；logue=speech 谈话→“speech between two persons两人之间的谈话”→] n. conversation between two or more persons对话：a dialogue between two countries两国之间的对话
▽dialogic [dialog (ue);-ic a.] a.对话的
dialogist [dialog (ue);-ist n.] n.对话者
apologize [apo-=away, off离开；log=speech话；-ize v.=to make做→“to make a speech off (after an offence)（在犯了过失后）说些借以解脱的话”→] v. express regret for a fault道歉：to apologize for being late因迟到道歉
▽apology [apo-;log;-y n.] n.道歉；谢罪
apologetic [apo-;log;-etic a.] a.道歉的；辩护的
apologia [apo-;log;-ia n.] n.辩解；自辩书
eulogy [eu-=good好；log=speech话；-y n.=the act表行为→“the act of making a good speech 说好听的话”→] n. praise 颂扬，赞颂：to pronounce a eulogy on somebody向某人致颂词
▽eulogize [eulog (y);-ize v.] v.颂扬；赞颂
eulogistic [eulog (y);-istic a.] a.颂扬的；歌功颂德的
prologue [pro-=before前；logue=speech言→] n. speech or words before a play or poem戏剧的开场白；序诗：the prologue to a long poem一首长诗的序诗
epilogue [epi-=after在……之后；logue=speech言→“speech after a play在全剧结束后说的话”→] n. speech at the end of a play;concluding part of a book戏剧的收场白；书的结尾部分：the epilogue of a novel一本小说的尾声
philology [phil=to love爱；-o-;log=speech言；-y n.=the art艺术→“the art for people who love good speech为讲究语言艺术的人提供技巧”→] n. (old-fashioned) the science and art of language（旧称）语言学
▽philologic [philolog (y);-ic a.] a.（旧称）语言学的
顺便指出，log与-y结合，就成为术语后缀-logy,表示：（1）语言特色，如tautology；（2）研究对象，如sociology, zoology；（3）论述过程，如trilogy等。
tautology [tauto=the same同样；-logy n.=the character of speech语言特点→“speech characterized by repeating the same idea重复同样意思的语言特点”→] n. fault style of using words that say the same thing同义反复的语病；赘述：a speech full of tautologies充满无谓的重复的演说
▽tautological [tautolog (y);-ical a.] a.重复的；赘述的
sociology [socio=social社会的；-logy n.=the study of……学→] n. the study of social structure and fuctioning社会学：modern sociology现代社会学
▽sociological [sociolog(y);-ical a.] a.社会学的
trilogy [tri=three三；-logy n.=speech说话，叙述→“discourse in three sections分成三个部分的叙述”→] n. group of three related literary or operatic works（小说或戏剧的）三部曲：a trilogy by Theodore Dreiser德莱塞写的三部曲
