disappointed

(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."

(adj) disappointingly unsuccessful. Synonyms: defeated, discomfited, foiled, frustrated, thwarted. Examples: "Disappointed expectations and thwarted ambitions." "Their foiled attempt to capture calais." "Many frustrated poets end as pipe-smoking teachers." "His best efforts were thwarted."