A verb for when mistrust increases?

Question

After what he did, her mistrust in their relationship _______ .

So they already had mistrust in this agreement, but with the recent turns of events their mistrust ______ .

If you do that, their mistrust in you would ______ .

I thought about "empower", "increase", and "raise". What is an idiomatic verb for such contexts?

Answer 1

I would use grow:

After what he did, her mistrust in their relationship grew.
So they already had mistrust in this agreement, but with the recent turns of events their mistrust grew.
If you do that, their mistrust in you would grow.

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From Merriam-Webster's entry for grow:

2 b : INCREASE, EXPAND
// grows in wisdom