• vi. 标记；衰退；枯萎
• vt. 标记；插旗
• n. 标志；旗子

来自辅音丛fl, 扑腾，拍打，拟声词。即模仿旗帜或菖蒲在风中晃动的声音。引申义热情衰减，主要用于形容词unflagging, 不懈的。

flag

flag: English has at least three separate words flag, none of whose origins are known for certain. Both the noun ‘cloth used as an emblem’ [16] and the verb ‘droop, decline’ [16] may have developed from an obsolete 16th-century adjective flag ‘drooping, hanging down’, but no one knows where that came from. Flag the plant [14] is probably related to Danish fl?g ‘yellow iris’, but beyond that the trail goes cold. Flag as in flag-stone [15] originally meant ‘piece of turf’.

It probably came from Old Norse flaga ‘stone slab’. This also gave English flaw (which originally meant ‘flake’), which is related to English floe, and goes back to a Germanic base, a variant of which produced English flake.
=> flake, flaw, floe

flag (n.1)

"cloth ensign," late 15c., now in all modern Germanic languages (German Flagge, Dutch vlag, Danish flag, Swedish flagg, etc.) but apparently first recorded in English, of unknown origin, but likely connected to flag (v.1) or else an independent imitative formation "expressing the notion of something flapping in the wind" [OED]. A guess considered less likely is that it is from flag (n.2) on the notion of being square and flat.

Meaning "name and editorial information on a newspaper" is by 1956. U.S. Flag Day (1894) is in reference to the adopting of the Stars and Stripes by the Continental Congress on June 14, 1777.

flag (v.1)

1540s, "flap about loosely," probably a later variant of Middle English flakken, flacken "to flap, flutter" (late 14c.), which probably is from Old Norse flaka "to flicker, flutter, hang losse," perhaps imitative of something flapping lazily in the wind. Sense of "go limp, droop, become languid" is first recorded 1610s. Related: Flagged; flagging.

flag (n.2)

"flat stone for paving," c. 1600, ultimately from Old Norse flaga "stone slab," from Proto-Germanic *flago- (see flake (n.)). Earlier in English as "piece cut from turf or sod" (mid-15c.), from Old Norse flag "spot where a piece of turf has been cut out," from flaga.

flag (n.3)

plant growing in moist places, late 14c., "reed, rush," perhaps from Scandinavian (compare Danish fl?g "yellow iris") or from Dutch flag; perhaps ultimately connected to flag (v.1) on notion of "fluttering in the breeze."

flag (v.2)

1875, "place a flag on or over," from flag (n.1). Meaning "designate as someone who will not be served more liquor," by 1980s, probably from use of flags to signal trains, etc., to halt, which led to a verb meaning "inform by means of signal flags" (1856, American English). Meaning "to mark so as to be easily found" is from 1934 (originally by means of paper tabs on files). Related: Flagged; flagging.

1. On top of the gantry the American flag flew.

台架顶上飞舞着美国国旗。

来自柯林斯例句

2. They flew the flag of the African National Congress.

他们升起非洲人国民大会的旗帜。

来自柯林斯例句

3. He had unmistakably been waving his flag to attract the referee's attention.

他显然一直在挥舞旗子吸引主裁判的注意。

来自柯林斯例句

4. Steve Crabb can fly the flag with distinction for Britain in Barcelona.

史蒂夫·克拉布在巴塞罗那可以旗帜鲜明地支持英国。

来自柯林斯例句

5. Staff can use the noticeboard to flag up any concerns.

员工可以用布告栏表达任何关注。

来自柯林斯例句