词根：lev(liev) = to raise（举, 升）, to light（轻的）
来自拉丁语的levare意为to raise,to lift, light,smooth等。其变形为liev。
同源词：
1. alleviate [使变得更轻al<ad(=to, add)+lev(=light, lift)]
vt.减轻（痛苦等），缓解
alleviation n. 减轻，缓解
Aspirin usually alleviates moderate pain symptoms. 通常阿司匹林可以缓解轻度疼痛。
2. irrelevant [不能再举起的ir<in(=not)+re(=again)+lev（=lift,light）]
adj.不恰当的，不切题的；无关系的
irrelevance/irrelevancy n.不恰当，不对题；无关系
My professor said the third paragraph of my essay is irrelevant . 教授说我论文的第三段与论文整体没有关联。
3. levity [轻浮的行为lev（=light,lift）
n. 轻率；轻浮
l enjoy our professor's levity,It makes the hour go faster. 我喜欢我们教授轻松的风格，因为这让时问过得很快。
4. relevant [再次举起的re(=again)+lev（=Iift, light）]
adj.有关系的，有关联的；恰当的
relevance/relevancy n.相关性；恰当
relevantly adv.恰当地
The bibliography contains items relevant to the subject of cardiopulmonary health. 参考文献目录中包含与心肺健康这一主题相关的条目。
5. elevate
v.举起；提高 e<ex(=out), lev（=lift）
elevate the voice 提南嗓音
elevated railway/railroad 高架铁道
6. elevation
n.高度，海拔；提高；高尚；（炮的）仰角；（建筑物的）立视图 *e<ex(=out),lev(=lift)
elevation of 3.000 meters 海拔3.000米
elevation of thought 思想的高尚
7. elevator
n.电梯：升降机 *e<ex(=out), lev(=lift)
8. lever
n.杠杆；控制杆；手段 v. 用杠杆移动 *lev(lift)
9. leverage
n.杠杆作用；杠杆装置；（为达到某一目的而使用的）手段 *lev（=lift）
political leverage 政治手段
10. levitate
v.（使）飘浮；（使）升空 *lev（=lift）
levitation n.（依靠超自然力量的）空中飘浮
11. levy
v.征收（税金等）；征集，召集；发动与…的战争（~ on）；（依据法律）扣押
n．课税，征税；征集；征兵 *lev(=light)
levy a tax/a fine/a ransom on（向…征收税金，罚金/索取赎金）
levy on a person's property/estate 扣押某人的财产/不动产
capital levy 资产税
12. relieve
v.减轻（痛苦、负担等）；救济；换班；使解除；使突出，使醒目 *re(=again), liev<lev(=lift)
relief n.减轻；宽慰；救济；救济品；换班
relieve one's feelings（哭喊或打闹以）发泄情绪
relieve oneself，nature/the bowels 排泄，方便
词根：pun, pen(poen) = to punish, pen
来自拉丁语的pun,pen 意为to punish,pen 变形为poen。同义词根为来自拉丁语的veng。
（*拉丁文poena (=penalty),punire (=to punish)——英文字根字典）
同源词：
1. impunity（不受惩罚 im<in(=not) + pun(=punish)）
n.免除（惩罚、损害等）
Citizens bribe public officials with impunity in many third world nation. 在许多第三世界国家，公民向公务员行贿可以不受惩罚。
2. penal（是惩罚、刑罚的 pen (=punishment)）
adj.刑罚的，刑事的
penalize v.对...处罚；使处于不利地位
penalty n.处罚，刑罚；罚金；犯规处罚
penally adv.用刑罚；刑事上
The warden has been advocating penal reform for many years.那监狱长很多年以来一直在提倡刑罚改革。
3. impenitent
adj.不知悔改的 *im<in(=not)
4. impunity
n.不受惩罚；免受伤害《im- = in = not》
5. penance
n.赎罪，苦修
6. penitence
n.后悔，改过；忏悔
7. penitent
adj.悔罪的；后悔的
8. penitential
adj.后悔的，忏悔的，悔过的；苦修赎罪的
9. penology
n.刑罚学；监狱管理学
10. punishment
n.惩罚，处罚，惩戒；刑罚；<口>虐待
punish v.惩罚
punishable adj.可处罚的
capital punishment 极刑
corporal punishment 体罚
disciplinary punishment 纪律处罚
divine punishment 天罚
11. punitive
adj.刑罚的；惩罚的
punitive expedition 讨伐
punitive justice 困果报应
12. repent
v.后悔，悔改 *re(=again,back)
13. repentant
adj.后悔的，悔改的 *re(=again,back)
repentant sinner 悔过自新的罪人
repentant of his folly 对自己的愚蠢行为感到后悔
the righteous and the repentant 正人君子和悔改者
14. subpoena
n.[律]传票 v.传唤，传讯 *sub(=under) ,poen<pen(=punish)
be subpoenaed as a withness 作为证人被传唤
15. penitentiary
n.监狱 adj.导致监禁的；用做惩处的；监狱的 （使其反悔的地方）《-ary 表示场所的后缀》
16. penalize
v.宣告有罪；规定应罚
词根：mur = wall
来自拉丁语的mur 意为wall。
（*拉丁文murus(=wall)——英文字根字典）
同源词：
1. immure（关在墙内im<in(=in) +mur (=wall)）
vt.oneself + in +sth 使闭门不出；监禁，禁闭
The old woman immured herself in her cottage and died there years later. 那个老妇人在自己的小屋内闭门不出，几年后死在了那里。
2. intramural
adj.同一校内的；同一城市的 *intra(=within)
take third place in the hundred-meter dash in the intramural track meet.在校内田径运动会的100米短跑中取得第三名。
3. extramural
adj.（大学等的）校园外的；（城邑等）边界外的 *extra(=outside)
extramural lectures /studies/students 校外课程/学习/学生
4. mural
adj.墙壁的；墙壁似的；墙壁上的
n.壁画
mural painting 壁画
词根词缀：terce-, ter-
【来源及含义】Latin: third, thrice
【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "three, third": terti-; tri-, tre; trigono-; trito-.
【同源单词】terce, tercel, tercentenary, tercentennial, tercet, tierce
词根词缀：terti-, tern-, ter-
【来源及含义】Latin: third; three each; three times
【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "three, third": terce-; tri-, tre; trigono-; trito-.
【同源单词】sesquitertian, ternary, tertigravida, tertipara, tertium quid
词根词缀：tri-, tre-
【来源及含义】Greek > Latin: a numerical prefix meaning, three, thrice, threefold; triple; a word element for number 3
【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "three, third": terce-; terti-; trigono-; trito-.
【同源单词】ternary, treble, trebly, triacid, triact, triad
词根词缀：trigono-, trigon-
【来源及含义】Greek: triangular; three angles
【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "three, third": terce-; terti-; tri-, tre; trito-.
【同源单词】trigon, trigonal, trigone, trigonectomy, trigoneutic, trigonid
词根词缀：trit-
【来源及含义】Latin: to rub; to thresh, to grind; to wear away; from tritus, past participle of terere, "to rub"
【相关描述】Don't confuse this trit- with another trit- which means "third".
【相关词根词缀】 Cross references of word families that are related directly, or indirectly, to: "rub, rubbing; wear away; wipe": bruxo, brux-; frica-, frict-; terg-; tribo-; -tripsy.
【同源单词】antiattrition, attrite, attrition, biodetritus, contrite, contritely
词根词缀：trito-, trit-
【来源及含义】Greek: third; a number which is often used as a prefix
【相关描述】Don't confuse this trit- with another trit- which means "rub, wear away".
【相关词根词缀】 Cross references of word families that are related, partially or totally, to: "three, third": terce-; terti-; tri-, tre; trigono-.
【同源单词】epitrite, tricuspid, tritagonist, tritanomaly, tritanopia, tritaph