What Does “Kill sth off” Mean?
“Kill sth off” means to completely destroy, remove, or cause something to disappear. It is often used when talking about ending something or causing its extinction.
Introduction
The phrasal verb “kill sth off” is commonly used in English to describe the action of destroying or eliminating something completely. Whether it refers to pests, ideas, companies, or habits, “kill sth off” means causing something to stop existing or functioning. Understanding the “kill sth off meaning” helps learners express situations where something is ended or removed in a strong way. This phrase is useful in everyday conversations, business discussions, and storytelling. Knowing how to use “kill sth off” correctly will improve your fluency and help you sound more natural in English.
Quick Info Box
- Phrasal verb: kill something off
- Type: transitive
- Level: B2
- Short meaning: to completely destroy or eliminate something
Structure (Grammar Rules)
“Kill sth off” is a separable phrasal verb, which means the object can come between the verb and the particle or after the particle.
- kill + object + off (e.g., kill the weeds off)
- kill off + object (e.g., kill off the weeds)
Since it is transitive, it always needs an object (something to be killed off).
How to Use “Kill sth off”?
Use “kill sth off” when you want to say that something is completely removed, destroyed, or ended. It can be used in many contexts such as:
- Destroying pests or plants
- Ending a business or product
- Stopping habits or trends
- Eradicating ideas or beliefs
It is suitable for both formal and informal settings but sounds stronger than just “remove” or “stop.”
Examples
Here are some natural examples using “kill sth off” in sentences:
- The farmer used chemicals to kill off the harmful insects.
- Many small bookstores were killed off by online shopping.
- They hope the new policy will kill off corruption in the company.
- Smoking bans helped kill off the habit in many public places.
- Some old traditions are slowly being killed off by modern culture.
Common Mistakes
People sometimes misuse “kill sth off” by forgetting the object or confusing the word order. Here’s what to avoid:
- Incorrect: The company kill off because of debts.
- Correct: The company was killed off because of debts.
- Incorrect: They kill off quickly the weeds.
- Correct: They quickly kill off the weeds.
Remember, “kill sth off” always needs an object and follows normal word order.
Differences / Synonyms
Similar phrasal verbs include “get rid of,” “do away with,” and “wipe out.” However, “kill sth off” often implies complete destruction or extinction, which is stronger than simply removing something.
- Get rid of: To remove but not necessarily destroy (e.g., get rid of old clothes).
- Do away with: To abolish or stop something (e.g., do away with unnecessary rules).
- Wipe out: To destroy completely, often used for larger scale (e.g., wipe out a species).
“Kill sth off” is more focused on causing something to disappear or end, often permanently.
Common Collocations
Here are common objects used with “kill sth off” and their meanings:
- Weeds: unwanted plants in gardens or fields
- Insects/pests: small animals harmful to crops or homes
- Business/company: an organization that stops operating
- Habit: a repeated behavior or practice
- Tradition: a custom or belief passed down
Related Phrasal Verbs
Here are related phrasal verbs of kill sth off:
Real-life Dialogue
Here is a short conversation using “kill sth off”:
Anna: Have you noticed how many local shops have closed recently?
Ben: Yes, online shopping is really killing them off.
Anna: It’s sad, but I guess it’s hard to compete.
Practice
Choose the correct option to complete the sentence:
The new pesticide helped to ________ the bugs in the garden.
- a) kill off
- b) get away
- c) make up
- d) put off
Answer: a) kill off
FAQs
- Q: Can “kill sth off” be used for people?
A: Usually no, it is used for things, habits, or groups, not directly for people. - Q: Is “kill sth off” formal or informal?
A: It can be used in both but is more common in informal and conversational English. - Q: Can the object go between “kill” and “off”?
A: Yes, “kill the weeds off” and “kill off the weeds” are both correct. - Q: What is the difference between “kill off” and “wipe out”?
A: “Wipe out” often refers to larger scale destruction, while “kill off” can be smaller or more specific. - Q: Is “sth” always used in “kill sth off”?
A: “Sth” means “something” and is used in explanations; in real sentences, use the actual object.

