"he grumbled a rude response" "Stones grumbled down the cliff"
The guard growled out a warning, threatening the prisoners with his gun.
看守吼了一聲警告,並用槍威脅囚犯們。
The bear..turned, reared, showed his teeth, and growled.
牛津高階第八版
美國韋氏詞典
Dictionary.com
Free Dictionary
維基百科 (自由的百科全書)