词源 |
downstairs adv."down the stairs, below, to or on a lower floor," 1590s, from the prepositional phrase; see down (adv.) + stair. As an adjective, "pertaining to, relating to, or situated on the lower floor of a house," by 1819. As a noun, "the downstairs part of a building," by 1843. updated on October 04, 2018 |