1. causing annoyance, disappointment, or anger because something is difficult, slow, or prevents you from achieving what you want

Examples

• The slow internet connection was frustrating when I tried to watch the video.
• It's frustrating to study hard for a test and still not get the grade you wanted.
• The frustrating part of the project was that we kept running into unexpected problems.
• She found the long wait at the doctor's office frustrating.
• Learning a new language can be frustrating at first, but it gets easier with practice.
• The frustrating delay meant we missed our flight.
• He felt frustrated by the frustrating rules that didn't make sense.