boom

boom¹
noun

a loud, deep, resonant sound
低沉有回响的声音；隆隆声
the deep boom of the bass drum.
低音鼓的低沉声。
■the characteristic resonant cry of the bittern.
麻鳽的鸣叫声

verb

[noobj.]make a loud, deep, resonant sound
发出低沉有回响的声音；发出隆隆声
thunder boomed in the sky.
空中传来隆隆的雷声。
her voice boomed out.
她说话声音低沉。
■[with direct speech]say in a loud, deep, resonant voice.
用深沉的声音讲话
‘Stop right there,’ boomed the Headmaster.
“站住！”校长用低沉的声音说。
■(of a bittern) utter its characteristic resonant cry.
（麻鳽）鸣叫

习惯用语
boom boom

(Brit. informal)an exclamation made after delivering the punchline of a joke
(英，非正式)［讲完笑话中的妙语后用的感叹词］梆梆！

派生
boominess
noun
boomy
(boomier, boomiest)
adjective(boomier, boomiest)
语源

late Middle English (as a verb): ultimately imitative; perhaps from Dutch bommen 'to hum, buzz'

boom²
noun

a period of great prosperity or rapid economic growth
迅速增长，繁荣
the London property boom.
伦敦地产的暴涨。
the boom years of the late 1980s.
20世纪80年代后期的繁荣期。

verb

[noobj.]experience a period of great prosperity or rapid economic growth
繁荣，昌盛
business is booming.
商业蓬勃发展。

派生
boomlet
noun
boomy
(boomier, boomiest)
adjective(boomier, boomiest)
语源

late 19th cent. (originally US): probably from boom

boom³
noun

a long pole or rod, in particular
吊杆，尤指
■a pivoted spar to which the foot of a vessel's sail is attached, allowing the angle of the sail to be changed.
张帆杆
■[often as modifier]a movable arm over a television or film set, carrying a microphone or camera.
话筒吊杆；（摄影机升降架的）支臂
a boom mike.
带有吊杆的话筒。
■a floating beam used to contain oil spills or to form a barrier across the mouth of a harbour or river.
水栅，拦障

语源

mid 16th cent. (in the general sense 'beam, pole'): from Dutch, beam, tree, pole'; related to beam

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