frus⋅tra⋅tion  [fruh-strey-shuhn]

1.act of frustrating; state of being frustrated: the frustration of the president's efforts. instance of being frustrated: to experience a series of frustrations before completing a project.
3.something that frustrates, as an unresolved problem.
4.a feeling of dissatisfaction, often accompanied by anxiety or depression, resulting from unfulfilled needs or unresolved problems.