• adj. 平的；单调的；不景气的；干脆的；平坦的；扁平的；浅的
• adv. （尤指贴着另一表面）平直地；断然地；水平地；直接地，完全地
• n. 平地；公寓；平面
• vt. 使变平；[音乐]使（音调）下降，尤指降半音
• vi. 逐渐变平；[音乐]以降调唱（或奏）
• n. （法）弗拉特（人名）；（英）弗莱特（人名）

来自PIE*pele, 平的。词源同plan, plane. 引申词义套间，公寓。

flat

flat: [14] The Old English word for ‘flat’ was efen ‘even’, and flat was not acquired until Middle English times, from Old Norse flatr. This came from a prehistoric Germanic *flataz, source also of German platt ‘flat’. And *flataz probably goes back to an Indo-European *pelə -, *plā-, denoting ‘spread out flat’, from which came Sanskrit prthūs ‘broad’, Greek platūs ‘broad’ (source of English place, plaice, plane [the tree], and platypus), Latin plānus ‘flat’ (whence English plane and plain ‘unadorned’), and also English place, plaice, plant, and flan. Flat ‘single-storey dwelling’ [19] is ultimately the same word, but it has a more circuitous history.

It is an alteration (inspired no doubt by the adjective flat) of a now obsolete Scottish word flet ‘interior of a house’, which came from a prehistoric Germanic *flatjam ‘flat surface, floor’, a derivative of the same source (*flataz) as produced the adjective.
=> flan, flatter, floor, place, plaice, plane, platypus

flat (adj.)

c. 1300, "stretched out (on a surface), prostrate, lying the whole length on the ground;" mid-14c., "level, all in one plane; even, smooth;" of a roof, "low-pitched," from Old Norse flatr "flat," from Proto-Germanic *flata- (cognates: Old Saxon flat "flat, shallow," Old High German flaz "flat, level," Old English flet (for which see flat (n.)), Old High German flezzi "floor"), from PIE *plat- "to spread" (source of Greek platys "broad, flat;" see plaice (n.)). From c. 1400 as "without curvature or projection."

Sense of "prosaic, dull" is from 1570s, on the notion of "featureless, lacking contrast." Used of drink from c. 1600; of musical notes from 1590s, because the tone is "lower" than a given or intended pitch; of women's bosoms by 1864. Flat tire or flat tyre is from 1908. Flat-screen (adj.) in reference to television is from 1969 as a potential technology. Flat-earth (adj.) in reference to refusal to accept evidence of a global earth, is from 1876.

flat (n.)

1801, "a story of a house," from Scottish flat "floor or story of a house," from Old English flett "a dwelling; floor, ground," from the same source as flat (adj.). Meaning "floor or part of a floor set up as an apartment" is from 1824. Directly from flat (adj.) come the senses "level ground near water" (late 13c.); "a flat surface, the flat part of anything" (1374), and "low shoe" (1834).

flat (adv.)

1550s, "absolutely, downright;" 1570s, "plainly, positively," from flat (adj.). Flat-out (adv.) "openly, directly" is from 1932, originally in motor racing, picked up in World War II by the airmen; earlier it was a noun meaning "total failure" (1870, U.S. colloquial).

flat (v.)

c. 1600, "to lay flat;" 1670s in music, from flat (adj.). Related: Flatted; flatting.

1. Early American weathervanes were most often cut from flat wooden boards.

美国早期的风向标大多截自平直的木板。

来自柯林斯例句

2. Warm weather has attracted the flat fish close to shore.

煦暖的气候将比目鱼引到了近海。

来自柯林斯例句

3. Two years later he is flat broke and on the dole.

两年后，他一贫如洗，靠失业救济金生活。

来自柯林斯例句

4. She had small feet and hands and a flat, round face.

她的手脚都很小，脸又扁又圆。

来自柯林斯例句

5. I lay the painting flat to stop the wet paint running.

我把油画平放以防止未干的颜料流动。

来自柯林斯例句