Bellow

I've always thought that bellow was a very powerful sounding word and its sound fits its definition perfectly.

As a verb, according to the AHD, to bellow means:

1. To roar deeply, as does a bull.

2. To shout in a deep voice.

In noun form a bellow is a loud shouting or roaring noise.

This word is completely from English going back to Old English with the words belgan, meaning to be enraged and bylgan, meaning to bellow. It then traveled to Middle English and transformed into the word belwen.