To exterminate a group of people or animals means to kill all of them.
例句
A huge effort was made to exterminate the rats...滅鼠花了大力氣。They have a real fear that they'll be exterminated in the ongoing civil war...他們十分害怕自己會在持續的內戰中被徹底消滅。
英英詞典釋義
Noun
1. complete annihilation;
"they think a meteor cause the extinction of the dinosaurs"