1. [ adjective ] disappointingly unsuccessful
Synonyms: disappointed foiled discomfited thwarted defeated

"disappointed expectations and thwarted ambitions" "their foiled attempt to capture Calais" "many frustrated poets end as pipe-smoking teachers" "his best efforts were thwarted"

Related terms: unsuccessful
2. [ adjective ] used especially of feelings of defeat and discouragement
Synonyms: discouraged balked baffled
Related terms: defeated
Similar spelling:   frustrate