disappoint
UK: ˌdɪsəˈpɔɪnt | US: ˌdɪsəˈpɔɪnt
vt. to fail to fulfill the hopes or expectations of someone
vt. to cause someone to feel sad or dissatisfied by not being as good as expected
The word "disappoint" originates from Middle French desappointer (to remove from office, undo an arrangement), combining the prefix dis- (expressing reversal) and appointer (to arrange or assign). Over time, its meaning shifted from literal removal of an appointment to the figurative sense of failing to meet expectations. The logic reflects a transition from concrete action (undoing plans) to emotional consequence (causing dissatisfaction).
The canceled concert disappointed thousands of fans.
She tried not to disappoint her parents by working harder.
The movie’s ending disappointed critics despite its strong start.
His lack of effort disappointed the team.
The product’s poor quality disappointed early buyers.