Synonyms for Belittle (same or very similar meaning)
WordNet sense 1 (cause to seem less serious; play down):
denigrate, derogate, minimize, derogateWordNet sense 2 (express a negative opinion of):
disparage, pick atWordNet sense 3 (lessen the authority, dignity, or reputation of):
diminishFrom the ODE community, based on WordNetadd/edit