Hi DenysLa tour,
We can see here that you want to download the Office Word on your iPad. The only way to download Office Word on your iPad is to have the device updated to the new version as that is the requirement needed. Office for iPad/iPad Pro and iPhone requires iOS
10.0 or later. You can see this information from the Frequently asked questions article from this
link. What we can suggest is to contact the device manufacturer to assist you in updating your version or to check if there's
other way to download and get the Office Word using your current device version.
If you need clarifications, feel free to message us again.
Thank you.