Solution:Diminish (Verb) = decrease; reduce; lessen.Augment (Verb) = to increase the size or value of something.
Look at the sentences:
We have seen our house diminish greatly in value over the last six months.
We would have to find work to augment his income.
Swell up to become larger and rounder than usual; to (cause to) increase in size or amount.
Look at the sentence:
My foot swelled up to three times the normal size when it was stung by a wasp.