1. You should never trust an undependable person with important tasks.
2. The weather forecast this week has been undependable, changing every few hours.
3. I can't rely on my car because it's undependable and always breaking down.
4. The company's undependable internet connection makes it difficult to work efficiently.
5. It's frustrating to have an undependable friend who constantly cancels plans at the last minute.
6. The undependable bus schedule often causes me to be late for work.
7. I don't want to hire that contractor again because he was undependable and never showed up on time.
8. The undependable performance of the team's star player cost them the championship.
9. It's hard to count on an undependable source for accurate information.
10. The undependable quality of the product led to many customer complaints and returns.