- To assure someone is to remove someone’s doubts.
- To ensure something is to make sure it happens—to guarantee it.
- To insure something or someone is to cover it with an insurance policy.
Some sources note that people use assure, ensure, and insure interchangeably. All three verbs have something to do with “making sure” and are therefore similar, but each of them has a distinct meaning that makes it better suited for some uses than the other two. So they might not be an interchangeable trio so much as they are simply commonly confused words.
What Does Assure Mean?
Assure is something you would do to a person or an animal. These beings can have doubts or insecurities you can remove by assuring them, by giving them assurance:
In the United Kingdom and other countries of the Commonwealth, the word assurance can also refer to a particular type of insurance:
What Does Ensure Mean?
When you ensure something, you’re making sure it is going to happen:
What Does Insure Mean?
To insure something or someone is to cover it with an insurance policy, a kind of agreement that states that if something happens to someone or something that’s insured, the insurance company will provide compensation:
from Grammarly Blog https://www.grammarly.com/blog/assure-ensure-insure/