1. The company's financial situation became untenable after they lost their biggest client.
2. The argument put forth by the opposition was clearly untenable and quickly dismissed.
3. The current living conditions in the slums are untenable and in desperate need of improvement.
4. The teacher found it untenable to continue working in a school with such poor resources.
5. The athlete's injury made it untenable for him to continue competing in the championship.
6. The politician's promise to lower taxes was deemed untenable by economists.
7. The landlord's refusal to make necessary repairs rendered the apartment untenable for the tenants.
8. The company's decision to cut employee benefits was met with strong opposition as it was deemed untenable.
9. The student's excuse for missing the exam was deemed untenable by the professor.
10. The CEO's decision to ignore the concerns of the employees was ultimately untenable and led to a strike.