名詞 roaring:

1. a deep prolonged loud noise
   同義詞：boom, roar, thunder
2. a very loud utterance (like the sound of an animal)
   同義詞：bellow, bellowing, holla, holler, hollering, hollo, holloa, roar, yowl

動詞 roar:

1. make a loud noise, as of wind, water, or vehicles
   同義詞：roar, howl
2. utter words loudly and forcefully
   同義詞：thunder, roar
3. emit long loud cries
   同義詞：howl, ululate, wail, roar, yawl, yaup
4. act or proceed in a riotous, turbulent, or disorderly way-R.A.Billington
   同義詞：roar
5. make a loud noise, as of animal
   同義詞：bellow, roar
6. laugh unrestrainedly and heartily
   同義詞：roar, howl

形容詞 roaring:

1. very lively and profitable
   同義詞：booming, flourishing, palmy, prospering, prosperous, thriving
2. loud enough to cause (temporary) hearing loss
   同義詞：deafening, earsplitting, thunderous, thundery

副詞 roaring:

1. extremely

1. The loud, roaring noise of an engine operating at high speed.
   嗚嗚聲高速運轉(zhuǎn)的機器的高且喧鬧的噪音
2. It's a poor teacher who can only control the class by roaring at the pupils.
   只有對小學(xué)生們大吼大叫才能控制課堂的老師是不稱職的老師。
3. The news was greeted with roaring cheers among the workers.
   工人們聽到這消息時都歡聲雷動。
4. The place was a blazing, raging, roaring, etc inferno.
   那地方是一片熊熊的、 滾滾的、 咆哮的 ... 火海。

roar.ing

adj.（形容詞）
Very lively or successful; thriving:
非?；钴S或成功的；興旺的：
例句：
a roaring trade.
興隆的生意

Used as an intensive:
用作加強語氣詞：
例句：
roaring drunk.
喝得大醉

【引伸】
roar.ingly
adv.（副詞）