frustrate

1 - In thinking about the deadline of an urgent task, you're likely to get anxious and frustrated.

2 - Over the past few years the Internet has gone from being the promised land to being a place of confusion and frustration for many.

3 - Recognizing that it takes a longer time to cultivate business relationships in Japan than in the United States, American business executives should not expect to make a deal in just a few days or they will depart in frustration, having made no progress.

4 - Most stutterers can recite poems or sing with relative ease, but normal conversation can be a distressing exercise in frustration.

5 - Traditionally, the study of planet formation has proved frustrating, as astronomers have never been sure whether their theories apply to other planetary systems.