to disconcert, embarrass, or abash

With his composure, he survived every attempt to discountenance him.

to show disapproval of

The teachers discountenanced smoking by the students.

disapproval; disapprobation.

verb

approve , back , countenance , sanction , support

verb

condemn , count me out , deprecate , disapprove , discommend , discourage , disesteem , disfavor , dispute , frown on * , hold no brief for , not go for , not stand for , object to , put down , resist , take a dim view of , take exception to , abash , chagrin , confuse , discomfit , discompose , faze , humiliate , rattle , shame , frown on , object , confound , discomfort , disconcert , mortify