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air (n.1)

14世纪, “环绕地球的看不见的气体”, 来自古法语 air “大气, 微风, 天气” (12世纪), 来自拉丁语 aer “空气, 下层大气, 天空”, 来自希腊语 aēr (属性 aeros) “雾, 霾, 云”, 后来是“大气” (可能与 aenai “吹, 呼吸” 有关), 来源不明. 它可能来自一个PIE *awer-, 因此与 aeirein “提高” 和 arteria “气管, 动脉” (见 aorta) 的概念有关, 即“提升, 悬浮, 上升的东西”, 但这有语音上的困难.

在荷马语中多为“浓密的空气, 雾气;” 后来“空气” 作为四要素之一. 印欧语系中“空气” 的词往往与风, 光明, 天空有关. 在英语中, air 取代了原生 lyft, luft (见 loft (n.) ). 在旧化学中, 任何气体都用 air (带限定形容词).

in the air “在一般意识中” 是1875年的. up in the air “不确定, 怀疑” 是1752年的. 要建立 castles in the air “entertain visionary schemes that have no practical foundation” 出自1590年代(17世纪英语曾 airmonger “one preoccupied with visionary projects” ). 广播意义(如 on the air , airplay) 最早记录于1927年. 至 give (someone) the air “解雇” 是1900年的. Air pollution 是由1870年证明的. Air guitar 是由1983年. Air traffic controller 是由1956年.

air (n.2)

1590年代, “方式, 外表” (如 an air of mystery); 1650年代, “假定的方式, 受影响的外表” (特别是在短语 put on airs, 1781), 来自法语 air “样子, 外表, mien, bearing, 语气” (古法语 aire “现实, 本质, 性质, 血统, 提取” (12世纪); 比较 debonair), 这也许是来自拉丁语 ager “地方, 田地, 生产地” (来自PIE词根 *agro- “田地” )上的“产地” 概念.

但一些法语资料将这个古法语词与 air (n. 1) 的源头联系起来, 英语中的这些意义也有可能是从 air (n. 1) 发展而来的或受其影响; 比较 atmosphere 和拉丁文 spiritus “呼吸, 微风” 的意义发展, 也有“高风亮节, 骄傲”, 以及 anima 的扩展意义.

air (n.3)

“旋律, 曲调, 有节奏地连接着不同的乐音,” 1580年代, 从意大利语 aria (见 aria) 本土化, 也许是通过法语.

air (v.)

1520s, “公开曝光”, 1520s, 来自 air (n. 1). 形象意义上的“张扬地暴露, 公开” 来自1610年代的物品, 1862年的意见, 不满等. 意思是“广播” (原指广播) 来自1933年. 相关链接: Aired; airing.

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Definitions of air from WordNet
1
air (n.)
a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of;
open a window and let in some air
a smell of chemicals in the air
I need some fresh air
air pollution
air (n.)
the region above the ground;
he threw the ball into the air
her hand stopped in mid air
air (n.)
a distinctive but intangible quality surrounding a person or thing;
an air of mystery
the house had a neglected air
Synonyms: aura / atmosphere
air (n.)
a slight wind (usually refreshing);
as he waited he could feel the air on his neck
Synonyms: breeze / zephyr / gentle wind
air (n.)
the mass of air surrounding the Earth;
it was exposed to the air
Synonyms: atmosphere
air (n.)
once thought to be one of four elements composing the universe (Empedocles);
air (n.)
a succession of notes forming a distinctive sequence;
she was humming an air from Beethoven
Synonyms: tune / melody / strain / melodic line / line / melodic phrase
air (n.)
medium for radio and television broadcasting;
the program was on the air from 9 til midnight
Synonyms: airwave
air (n.)
travel via aircraft;
if you've time to spare go by air
Synonyms: air travel / aviation
2
air (v.)
expose to fresh air;
Synonyms: air out / aerate
air (v.)
be broadcast;
This show will air Saturdays at 2 P.M.
air (v.)
broadcast over the airwaves, as in radio or television;
We cannot air this X-rated song
Synonyms: send / broadcast / beam / transmit
air (v.)
make public;
She aired her opinions on welfare
Synonyms: publicize / publicise / bare
air (v.)
expose to warm or heated air, so as to dry;
air (v.)
expose to cool or cold air so as to cool or freshen;
air out the smoke-filled rooms
air the old winter clothes
Synonyms: vent / ventilate / air out
From wordnet.princeton.edu