词根：qui, quiet = to rest（休息）, calm （安静的）
来源于拉丁语的quiet，quies 意为 to rest（休息），calm （安静的）。
同源词：
1. acquit [让某人心境平和ac,ad(=to) + qui(=quiet)]
vt. sb +of+ sth 宣判…无罪；使（自己）作出某种表现；使（自己）履行（或完成）
acquittal n. 宣判无罪；履行
acquittance adj.（债务的）清偿
ex) The jury acquitted the prisoner after a short deliberation. 陪审团稍作审议，决定宣判犯人无罪。
2. acquiesce [面对某事变得安静ac<ad(=to, intensive)+qui(=quiet)]
vi. to+sth 默认；默从
acquiescence n. 默认
acquiescent adj. 默认的
ex) I finally acquiesced to my parents' demands that l stop smoking. 最后我还是默从了我父母的要求，答应戒烟。
3. disquieting [不让心境平和、安宁的dis（=not）+qui(=quiet,rest)]
adj . 使不安的，令人担忧的
disquiet n. 使不安
disquietude n. 不安，担忧
disquietingly adv. 不安地，担忧地廷多
ex) The solider could not sleep due to the disquieting sounds of battle in the distance. 从远处传来的令人不安的战斗声使那个士兵无法入睡。
4. tranquility [完全安静的、平稳的状态tran<trans(=intensive)+qui(=quiet, rest)]
n. 平静；平稳
tranquil adj. 平静的；平稳的
tranquilizer n. 镇静剂
tranquilize v. 使安静；使镇定
ex) The tranquility here at Loon Lake is marvelous. 卢恩湖非常平静。
5. quiescent
n. 静止的，不动的
quiescence n. 静止，不活动；沉默
6. inquietude
n. 不安，担心 *in(=not)
7. quietism
n. [宗]寂静主义（天主教神修学派的主张）
8. quietude
n. 寂静；宁静
9. requiem
n.（天主教）安魂弥撒；安魂曲；挽歌 *re(=again,intensive)
10. unquiet
adj.不安的；心神不宁的；纷扰的 un-(=not)
词根：plac (plais), pleas = to please, to soothe, peace
来源于拉丁语的placēre（有的书籍上认为来源于拉丁语的placere） 意为 to please,to soothe,peace，它的变形为plais。
同源词：
1. complaisant（使完全快乐的 com(=intensive) + plais<plac(=please)）
adj.讨好的；彬彬有礼的；顺从的
complaisance n.彬彬有礼；讨好
The very rich often receive exceptionally complaisant service from their factotums. 勤杂工对富人的服务往往格外殷勤。
2. implacable（无法安抚的 im<in(=not) + plac(=soothe,peace,please)）
adj.不能安抚的，难以平息的；毫不宽容的
She could never quiet the implacable jealousy of her husband. 她无法平息丈夫的妒忌之心。
3. placate（使变得和平plac(=peace)）
vt.安抚，平息
placable adj.可安抚的；温和的；宽容的
placability n.易安抚；温和；宽容
placatory adj.安抚的；怀柔的
It's not easy to placate an enraged customer. 平息一们顾客的怒火并不是件容易的事。
4. complacent
adj.自我满足的 （完全被取悦）*com(=intensive,completely)
complacency n.自满；得意
with a complacent smile/air 面带着满意的微笑/满意的态度
5. complacence
n.自我满足，沾沾自喜 *com(=intensive,completely)
complacency(=complacence)
6. placid
adj.宁静的；温和的；沉着的 *id(=having the quality of )
placidity n.温和；沉着；宁静
placid lake 宁静的湖水
7. placebo
n.安慰剂（不含药性，仅为加强病人康复的希望）
8. please
v.取悦；使高兴；喜欢；愿意；请
pleased adj.高兴的；满意的；愉快的
pleasing adj.愉快的；令人喜欢的；可爱的
pleasant adj. 愉快的；快活的；友善的
9. pleasantry
n.诙谐；幽默；开玩笑《-ry 名词字尾》
10. pleasure
n.快乐；乐趣；享乐；愿望；爱好
11. displease
v.使不快；使厌烦；触怒（使不高兴）《dis- =not》
displeasing adj. 不愉快的
displeasure n.不愉快；不满；生气
12. unpleasant
adj.令人不愉快的；讨厌的《un- = not》
词根：mir = to wonder（惊讶）, to behold（看见）
来自拉丁语的mir 意为to wonder。
（*拉丁文mirari (=to wonder),mirare (= to behold),意为“惊讶地看”——英文字根字典）
同源词：
1. mirage （引起惊讶的事物 mir(=wonder)）
n.海市蜃楼；幻想，妄想
Is that a mirage up ahead,or am i finally seeing the Rocky Mountains?我们面前的是海市蜃楼，还是我终于见到了落基山脉？
2. miracle （令人见而惊讶者）
n.奇迹；(~of)惊人的事例
miracle play （中世纪取材自《圣经》或圣徒的）奇迹剧
miracle drug 有奇效的药
It's a miracle of ingenuity.这真是令人吃惊的精巧。
3. miraculous
adj.奇迹般的；超自然的；不可思议的
miraculously adv.神奇地；不可思议地
4. mirror
n.镜子；反映，真实的写照；榜样，典范
driving mirror （汽车的）后视镜
mirror image 镜像
Pepys's Diary is a mirror of lake mirrored the hillside. 平静的湖水倒映着山坡。
5. admire
v.钦佩，称赞；欣赏 （惊讶地瞪大眼睛） *ad(=to)
admirable adj.极好的；值得赞美的
6. admiring
adj.羡慕的；赞美的 *ad(=to)
admirer n.羡慕者；对女性的爱慕者
Mary and her many admirers 玛丽和她众多的仰慕者
admiring crowd 一群崇拜者
7. admiration
n.钦佩，赞美 *ad(=to)
express one's admiration for 表达对...的赞赏
8. marvel
n.奇异之事
v.惊异《拉丁文mirare- = to wonder》
marvel(l)ous adj.不平常的；奇异的
后缀：-let [名词后缀]
表示小
booklet 小册子
houselet 小房子
starlet 小星
townlet 小镇
piglet 小猪
rootlet 小根，细根
droplet 小滴，飞沫
cloudlet 小杂云
playlet 小型剧
filmlet 短（电影）片
bomblet 小型炸弹
lakelet 小湖
leaflet 小叶
statelet 小国家
springlet 小泉
streamlet 小溪
dovelet 幼鸽
hooklet 小钩子
kinglet 小国王，小王
chainlet 小链子
词根词缀：bentho-, benth-
【来源及含义】Greek: deep, depth; the fauna and flora of the bottom of the sea; sea bottom; depth [by extension, this element includes lake, river, and stream bottoms]
【相关词根词缀】Inter-related cross references, directly or indirectly, involving the "sea" and the "ocean" bodies of water: abysso- (bottomless); Atlantic; batho-, bathy- (depth); halio-, halo- (salt or "the sea"); mare, mari- (sea); necto-, nekto- (swimming); oceano-; pelago- (sea, ocean); plankto- (drifting); thalasso- (sea, ocean).
【同源单词】abyssal-benthic, abyssobenthic, archibenthal zone, archibenthic, archibenthos, benthal
词根词缀：flat-, flatu-
【来源及含义】Latin: to blow, a puff of wind or air; by extension, accumulation of gas in the stomach or bowels
【相关词根词缀】 Cross references of word groups that are related, directly or indirectly, to: "air, wind": aello-; aeolo-; aero-; anemo-; atmo-; austro-; phys-; pneo-, -pnea; pneumato-; turb-; vent-; zephyro-.
【同源单词】afflatus, conflate, conflation, deflate, deflation, deflation lake
词根词缀：lepido-, lepid-, lepo-, -lepis, lepro-, lepr-
【来源及含义】Greek > Latin lepra: flake, scale, scales, scaly, scabby
【相关词根词缀】 Cross references directly, or indirectly, involving the "skin": callus-; chorio-; cicatri- (scar); cori-; cuti-; hymen-; papulo- (pimple); psoro- (itch, mange); pustu- (blister, pimple); rhytid- (wrinkle); scabio- (mange, itchy); sebo- (grease, oil).
【同源单词】leper, lepidic, lepidoid, lepidophyte, lepidosis, lepidote
词根词缀：lepidopter-
【来源及含义】Greek: moths, butterflies; a combination of lepido-, "flake" or "scale" and ptero, "wing"
【相关词根词缀】This lepidopter- group of words comes directly from the lepido- unit of words.
A cross reference of other word family units that are related directly, or indirectly, with: "insects, bugs, worms; invertebrates":
aphidi-;
api-;
ascari-;
culci-;
Dung Beetle Survival;
Dung Beetles Important;
Eating Worms;
entomo-;
formic-;
Guinea worms;
helmintho-;
insecto-;
Insects: Importance;
isopter-;
meliss-;
mosquito;
Mosquito, other Languages;
Mosquitoes, Pt. 1;
Mosquitoes, Pt. 2;
myrmeco-;
scarab;
scoleco-;
sphec-;
taeni-;
termit-;
vermo-.
【同源单词】Lepidoptera, lepidopteral, lepidopteran, lepidopterid, lepidopterist, lepidopterology
词根词缀：limno-, limn-
【来源及含义】Greek: lake, marshy lake, pool, marsh
【同源单词】bathylimnetic, epilimnion, hypolimnetic, hypolimnion, limanth, limitrophic