bellow

名词 bellow:

1. a very loud utterance (like the sound of an animal)
   同义词：bellowing, holla, holler, hollering, hollo, holloa, roar, roaring, yowl
2. United States novelist (born in Canada in 1915)
   同义词：Saul Bellow

动词 bellow:

1. shout loudly and without restraint
   同义词：bawl
2. make a loud noise, as of animal
   同义词：roar

1. The sergeant bellowed orders at the platoon.
   士官向全排士兵大声地发出命令。
2. The music was so loud we had to bellow at each other to be heard.
   音乐的声音实在太大，我们只有彼此大声喊叫才能把话听清。
3. The bull bellowed angrily.
   公牛怒吼起来。
4. He bellowed with pain when the tooth was pulled out.
   牙被拔掉时，他疼得大叫。

bel.low

v.（动词）
bel.lowed,bel.low.ing,bel.lows
v.intr.（不及物动词）
To make the deep roaring sound characteristic of a bull.
吼叫：发出象公牛般的低沉吼叫声
To shout in a deep voice.
以低沉的声音叫喊
v.tr.（及物动词）
To utter in a loud, powerful voice.See Synonyms at shout
发出大而有力的声音参见 shout
n.（名词）
The roar of a large animal, such as a bull.
牛吼：大型动物的吼叫声，如公牛
A very loud utterance or other sound.
大声的发音或其他声音

来源：
Middle English belwen
中古英语 belwen
perhaps from Old English belgan [to be enraged]
可能源自 古英语 belgan [被激怒的]
bylgan [to bellow]
bylgan [吼叫]

【引伸】
bel.lower
n.（名词）