doss 来自拉丁词根dors,doss，表示后背，后面或者背面
Sleep; rest
A crude or makeshift bed.
To go to bed, especially in a crude or makeshift bed; sleep.
n. 床铺；简陋床铺；小客栈；睡眠
vi. 凑合躺下睡觉；将就过夜

例句：
After catching some doss, my mother went on with her work.
稍睡一会儿，我妈妈又继续她的工作。

dosser
a basket for carrying objects on the back; pannier.
a person who has no permanent home and who lives and sleeps on the streets or in cheap HOSTELS
(spoken) a person who is very lazy
n. 驮筐；背筐;【俚】(无固定住宿,常露宿街头或住廉价客栈者)流浪者;懒人

dossier “档案”其实就是在档案袋的“背面”写上某人的姓名等
A collection of papers giving detailed information about a particular person or subject.
n. 档案，卷宗；病历表册

dorsal
Anatomy. Of, toward, on, in, or near the back or upper surface of an organ, part, or organism.
Botany. Of or on the outer surface, underside, or back of an organ.
adj. 背部的；背的，背侧的

例句：
The shark's dorsal fin was cut off by the fisherman.
鲨鱼的背鳍被渔夫割了下来。

endorse
To write one's signature on the back of (a check, for example) as evidence of the legal transfer of its ownership, especially in return for the cash or credit indicated on its face.
To place (one's signature), as on a contract, to indicate approval of its contents or terms.
To acknowledge (receipt of payment) by signing a bill, draft, or other instrument.
To give approval of or support to, especially by public statement; sanction: endorse a political candidate. See Synonyms at approve.
vt.（支票等的）背书：签名于（支票的）背面以作为合法转让其所有权的证据，尤其是作为对标于其正面的现金或信用卡的交换 ；认可；签署；赞同；在背面签名

例句：
She has already endorsed the check.
她已在这支票背书。
His driving licence has been endorsed.
他的驾驶执照上有违章记录。
Many senators endorsed the new bill.
很多议员赞同该项新法案。

endorsement
The act of endorsing: The athlete was highly paid to do endorsements of products.
Something, such as a signature or voucher, that endorses or validates.
Approbation; sanction; support: The candidates competed for the union's endorsement.
An amendment to a contract, such as an insurance policy, by which the original terms are changed.
n. 认可，支持；背书；签注（文件）