letting down

(noun) the act of causing something to move to a lower level. Synonyms: lowering, letting down.

(verb) move something or somebody to a lower position. Synonyms: lower, take down, let down, get down, bring down. Example: "Take down the vase from the shelf."

(verb) fail to meet the hopes or expectations of. Synonyms: disappoint, let down. Example: "Her boyfriend let her down when he did not propose marriage."