to fail to fulfill the expectations or wishes of

His gross ingratitude disappointed us.

to defeat the fulfillment of (hopes, plans, etc.); thwart; frustrate

to be disappointed in love.

to bring or cause disappointment.

verb

delight , excite , make happy , please , satisfy

verb

abort , baffle , balk , bring to naught , bungle , cast down , chagrin , circumvent , come to nothing , dash , dash hopes , deceive , delude , disconcert , disenchant , disgruntle , dishearten , disillusion , dissatisfy , dumbfound , embitter , fail , fall down on , fall flat , fall short of , foil , founder , hamper , hinder , leave in the lurch , let down , miscarry , mislead , not show , put out , ruin prospects , stand up , tease , thwart , torment , vex , discontent , defeat , dismay , fall , frustrate , sadden