How do I turn off Copilot in Word documents?

I wrote the below out of sheer exasperation of not being able to turn this icon off.

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Copilot you are a pain in my side

As you follow me wherever I slide

Your icon poking its nose in where it doesn’t belong

You can go away now and run along

You are a constant distraction to my view

Can’t you just do one and shoo

Turning you off is no joy

Time for a new deploy

My frustrations written in rhyme and prose

When I really wish I could just make it doze

This visual disturbance I can do without

Now all I am left with is pulling my hair out

This icon is sending me around the twist

I really hope you get my gist  

Microsoft step up to the plate

Send this icon to purgatory state……