simple past tense and past participle of frustrate
"The broken engine left us frustrated, so we had to wait until morning to call a tow truck."
In plain English: To be frustrated means to feel annoyed and upset when you can't do something because of an obstacle.
"The noise outside frustrated me so much that I couldn't focus on my work."
disappointingly unsuccessful
"disappointed expectations and thwarted ambitions"
"their foiled attempt to capture Calais"
"many frustrated poets end as pipe-smoking teachers"
"his best efforts were thwarted"
Foiled, stopped, disappointed.
"The frustrated team sat in silence after their carefully planned strategy was foiled by unexpected rain."
In plain English: Frustrated means feeling annoyed and upset because you can't do something easily or get what you want.
"She felt frustrated when her computer wouldn't turn on."