Difference between Unalterably and Unchangeably

What is the difference between Unalterably and Unchangeably?

Unalterably as an adverb is in an unalterable manner; in a manner that makes it impossible to be altered. while Unchangeably as an adverb is in a way that cannot be varied, or changed.

We hope you now know whether to use Unalterably or Unchangeably in your sentence.