depreciate, deprecate

Depreciate or depreciate means to decline in monetary value--
Our plant will depreciate 10% over the next five years.
The car will depreciate $5000 the first year, almost as soon as it leaves the lot.
Depreciate may also mean to claim a decline in monetary value, for tax purposes--
We can depreciate this equipment up to 15% per year.

Deprecate or deprecate means to disparage or belittle; to express disapproval of--
So like her to deprecate something we've worked so hard on.
He's sure to deprecate any plan we present to him.

Now that you know that, you can say--
"Our accountant will deprecate any plan to depreciate our manufacturing plant by more than 5%."