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quarantine quaran+tin-ten quar-square正方形，四方形

词汇起源
Date: 1600-1700; Language: Italian; Origin: quarantina 'period of forty days', from Old French, from quarante 'forty', from Latin quadraginta]
a period of time when a person or animal is kept apart from others in case they are carrying a disease

period of time during which a vehicle, person, or material suspected of carrying a contagious disease is detained at a port of entry under enforced isolation to prevent disease from entering a country. A place for such detention.
Enforced isolation or restriction of free movement imposed to prevent the spread of contagious disease.
A condition of enforced isolation.
To isolate in or as if in quarantine.
To isolate politically or economically.
vt. 检疫；隔离；使隔离
n. 检疫；隔离；检疫期；封锁
vi. 实行隔离

例句：
The ship is still in rigorous quarantine.
该船仍在接受严格的隔离检疫。
The health officials placed the ship’s crew in quarantine.
卫生官员将该船的全体船员隔离, 进行检疫。

quarry quar-cor-heart

词汇起源
[Sense: 1; Date: 1300-1400; Language: Old French; Origin: quarriere, from an unrecorded quarre 'square stone', from Latin quadrum 'square']
[Sense: 2; Date: 1400-1500; Language: Old French; Origin: cuiree 'inside parts of a killed animal given to the hunting dogs', probably from Late Latin corata, from Latin cor 'heart']

An open excavation or pit from which stone is obtained by digging, cutting, or blasting.
A rich or productive source: found the book an indispensable quarry of information.
tr.v. quar·ried, quar·ry·ing, quar·ries
To obtain (stone) from a quarry, as by cutting, digging, or blasting.
To extract (facts, for example) by long, careful searching: finally quarried out the genealogy from hundreds of sources.
To use (land) as a quarry.
A hunted animal; prey. Hunted animals considered as a group; game.
An object of pursuit
n. 方形石,菱形石；采石场；猎物，被追逐的目标；来源
vi.费力地找
vt.采石； 挖出；努力挖掘

例句：
They are quarrying the hillside for marble.
他们正从山坡上采大理石。
He quarried in various books for scientific basis.
他从各种书籍中搜寻科学根据。
The policeman watched his quarry go into a bar.
警察看着他在追捕的人走进一家酒吧。

squad ‘square formation of troops’

词汇起源
Date: 1600-1700; Language: French; Origin: escouade, from escadre, from Italian squadra 'square', from Vulgar Latin exquadra; SQUARE2]

A small group of people organized in a common endeavor or activity.
The smallest tactical unit of military personnel.
A small unit of police officers.
Sports. An athletic team
n. [军]班；小队；五人组（篮球队的非正式说法）
vt. 把…编成班；把…编入班

squadron on=-oon 表示增大的后缀 balloon
A naval unit consisting of two or more divisions of a fleet.
An armored cavalry unit subordinate to a regiment and consisting of two or more troops.
A cavalry or armored unit of a European army, corresponding to a company.
A basic tactical air force unit, subordinate to a group and consisting of two or more flights.
A multitude or horde
n. 空军中队；一群；骑兵中队；分遣队
vt. 把…编成中队

例句：
Both of the dead men were identified as from No 15 squadron.
两名死者都被认出是15中队的。

词源小故事

abigail n.侍女，女仆

贵妇人的贴身侍女英语有时可用abigail来表示。基督教《圣经》故事中有个人物就叫Abigail。她因丈夫拿八（Nabal）拒绝支持大卫（David）而深表歉意，多次谦称自己为大卫的“侍女”，拿八死后被大卫纳为妻室之一。此后，许多作家都曾用该词作为侍女或女仆的名字。英国女王安妮（Anne）身边有一位臭名昭著的女侍臣也叫“Abigail”，全名是Abigail Hill。反复而广泛的使用，使Abigail最终由专有名词转化为普通名词，成为“侍女”或“女仆”的代称。