Belittle
verb
lessen the authority, dignity, or reputation of
“don't belittle your colleagues”
Similar: diminish
verb
cause to seem less serious; play down
“Don't belittle his influence”
Similar: minimize, denigrate, derogate
verb
express a negative opinion of
“She disparaged her student's efforts”
Similar: disparage, pick at
Word family
belittled · belittling