depreciate, discountenance, deprave, deplore, disprize, dispraise, denigrate, downgrade, devaluate, disvalue, more...

extol, praise, laud, commend

belittle, disparage, deride, mock, ridicule, more...

much, wise, self, secret, outraged, irish, less, scarce

to put down,   to put oneself down,   put yourself down,   think less