verb

reduce or underestimate the worth or importance of.

I resent the way people seem to devalue my achievement

belittle,depreciate,disparage,denigrate,decry,deprecate,make light of,treat lightly,discredit,underrate,undervalue,underestimate,deflate,detract from,diminish,minimize,trivialize,run down,traduce,defame,knock,slam,pan,bad-mouth,sell short,put down,pooh-pooh,look down one’s nose at,do down,do a hatchet job on,take to pieces,pull apart,pick holes in,drag through the mud,have a go at,hit out at,rubbish,slate,slag off,cry down,hold cheap,derogate,misprize,minify