英语词源字典 - 在线词源网站

affairs (n.)[affairs 词源字典]: "ordinary business," late 15c., plural of affair (n.).[affairs etymology, affairs origin, 英语词源]
airship (n.): also air-ship, 1888, translating German Luftschiff "motor-driver dirigible;" see air (n.1) + ship (n.).
backstairs: "stairs at the back of a structure," 1650s, from back (adj.) + stairs (see stair). Figurative use is attested earlier (1640s).
downstairs (adv., adj.): 1590s, from down (adv.) + stairs (see stair).
hairstyle (n.): also hair-style, "way of wearing the hair," 1913, from hair + style (n.).
upstairs (adv.): 1590s, from up (adv.) + stairs (see stair). As an adjective from 1782. The noun is first attested 1872. Adjectival meaning "characteristic of upstairs life" (in private rooms of a household, as opposed to servants' quarters) is recorded from 1942.
He [Halifax] had said he had known many kicked down stairs, but he never knew any kicked up stairs before. [Gilbert Burnet, supplement to "History of My own Time," from his original memoirs, c. 1697]