词根：sag = to perceive
来自拉丁语的sag意为to perceive。
同源词：
1. presage（事先感觉、感知pre(=before) +sag(=perceive)）
vt.预示；预言；预知，预感
n.前兆，预感；预知
Chest and arm pains,nausea,and shortness of breath can presage a heart attack.胸部和手臂疼痛、恶心以及气短都可能是心脏病发作的前兆。
2. sage
n.贤人，哲人 adj.智慧的；贤明的；<谑>道貌岸然的；一本正经的
3. sagacious
adj.精明的；有洞察力的；（动物）伶俐的
4. sagacity
n.贤明；睿智
Sagacity,unlike cleverness,may increase with age.与伶俐不同，睿智可能会随着年龄的增长而增长。
词根：log, loqu, locut = to speek（说话）
来自希腊语的log 意为speech；
（*希腊文legein(=to speak),logos(=word,speech,thought),拉丁文loqui(=to speak)。由“说话”衍生出“语言”、“思想”、“学问”等意思——英文字根字典）
同源词：
1. logomachy （斗言语的行为log(=speech) + mach(=fight)）
n.对词义的争执；舌战
They're just two ivory tower academics engaged in a literary logomachy. 他们不过是两名热衷于文学论战的象牙塔式的学者而已。
2. logical （话语正确的log (=to speak)）
adj.逻辑的；符合逻辑的；可想而知的
logic n.逻辑（学）
logicality n.合乎逻辑，逻辑性
logician n.逻辑学家
logically adv.逻辑上；符合逻辑地
The only logical conclusion i can draw is that he's guilty. 我可以得出的唯一合乎逻辑的结论就是他有罪。
3. apology
v.赔罪，道歉；辩解，辩护 *apo(=away)
apologize v.赔罪，道歉；辩解 apologize to his sister for being so rude 因自己如此无礼而向他妹妹道歉。
apologetic adj.道歉的，认错的；辩护的
write an apologetic letter写一封道歉信
4. analogy
n.类似，相似；比拟；类推 *ana(=again)
analogous adj.类似的，相似的；可比拟的
analogy between the human heart and a pump 人的心脏和抽水泵的相似性
false analogy 错误的类推
forced analogy 牵强的类推，牵强附会
5. catalogue
n.目录
v.做目录；将...编入目录 *cata(=completely)
library catalogue （图书馆的）图书目录
6. dialogue
n.对话（式的作品）；意见交换 *dia(=between)
dialogue between the two Presidents 两个总统之间的意见交换
7. eulogy
n.赞辞；赞颂 *eu(=good)
eulogize v.赞颂，称赞
eulogistic adj.颂扬的；歌功颂德的
eulogist n.赞颂者，称赞者
8. monologue
n.独白；（戏剧等的）独角戏 *mono(=one)
9. prologue
n.序言；（戏剧的）开场白；一系列事件的开端，序幕；念开场白（或开场诗）的演员 *pro(=before)
10. epilogue
n.（文学作品的）跋文；结语；尾声（在上面附加的言辞） *epi(=after)
11. decalog(ue) （deca (=ten) + log(ue) (=speak)）
n.十诫
12. anthropology
n.人类学 《anthropo = man》
13. astrology
n.占星术《astro = star》
14. biology
n.生物学《bio = life》
15. chronology
n.年代学；年代记；年表《chrono = time》
16. entomology
n.昆虫学（将昆虫切成两部分来研究的学问）《en- = in;tom- = to cut》
17. etymonlogy
n.语源学；语源 （研究语言真义的学问）《etymo = true》
18. genealogy
n.宗谱；系谱；家系 《genea = birth,race,descent》
19. geology
n.地质学；地质《geo = earth》
20. meteorology
n.气象学；气象《meteor = 大气中的现象；流星》
词根词缀：doul-, dulo-, dul-
【来源及含义】Greek: slave, servile, slavish; servitude; serving
【相关描述】A doula supports a woman and her family in achieving the kind of birth that they desire. A doula works in homes, hospitals, and birth centers; and gives, emotional, physical, and informational support. A careprovider, be he/she a midwife, OB/gyn, or family practitioner, will take care of a woman's prenatal care and birth. A doula is supposed to ensure that someone is always available to look after the mother-to-be emotionally. These objectives are facilitated by communication between the laboring woman, her partner, and her clinical care providers.
As a supportive companion (other than a friend or loved one) a doula is professionally trained to provide birth-labor support. She performs no clinical tasks. A doula also refers to lay women who are trained or experienced in providing postpartum care—mother and newborn care, breastfeeding support and advice, cooking, child care, errands, and light cleaning—for the family. To distinguish between the two types of doulas, one may refer to "birth doulas" and "postpartum doulas".
【同源单词】doule, doulios, doulos, dulia, dulocracy, hierodule
词根词缀：-ment
【来源及含义】Latin: a suffix; result of, means of, act of; place of action
【相关描述】The suffix -meant is a final word element derived through Middle English and French from the Latin suffix -ment(um), originally used to form agent and action nouns from verbs, now used to form nouns and denominative verbs in several related senses:
The verb combinations show no change in basic form: cement, compliment, lament.
Principal parts: -menting, -mented, -mented.
Related forms: -mentum (singular); -menta, -menti, -ments (plurals).
【同源单词】abolishment, abridgment, accompaniment, accomplishment, accouterment, achievement