kill off

Từ điển WordNet v3.1 - WordNet Dictionary

verb

kill en masse;
kill on a large scale;
kill many (Freq. 1)
- Hitler wanted to exterminate the Jews, Gypsies, Communists, and homosexuals of Europe
• Syn:
exterminate
• Derivationally related forms:
exterminator (for: exterminate)
• Hypernyms:
kill
• Verb Frames:
- Somebody ----s somebody
- They want to kill off the prisoners