Ensure v Insure (+Assure). Which is right?

Below is a transcript of the video.

Ensure, insure and assure - which to use and when?

Ensure with an e. Use this word to mean “make sure or certain” or to “guarantee”, as in:

We need to leave now to ensure we catch the train.

Insure with an i. If you’re in the UK, only use this word when you’re talking about insurance - that’s the financial product that will pay you money if something bad happens, as in:

I need to insure my house against burglary.

If you’re in the US, ensure with an e can be replaced with insure with an i. As in:

We need to leave now to insure we catch the Greyhound bus.

Assure. Use this when you’re talking about making someone feel sure or confident about something. As in:

She assured me she could do the job.

Here’s another way to look at it:

Broadly, use insure of an object - something you want to protect with insurance.

Use ensure of an outcome - something you want to make happen.

And use assure of a person - someone whose mind you want to put at ease.

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