disparage

Short definition from Wiktionary

Noun

1. 1
   Inequality in marriage; marriage with an inferior.

Verb

1. 1
   To match unequally; to degrade or dishonor.
2. 2
   To dishonor by a comparison with what is inferior; to lower in rank or estimation by actions or words; to speak slightingly of; to depreciate; to undervalue.
3. 3
   To ridicule, mock, discredit.