When something is beyond endurance, it means it is unbearable or intolerable. However, there are alternative phrases that can be used to express this feeling in different ways. For example, you could use words like excruciating, insufferable, or unspeakable to describe a pain or emotion that you cannot tolerate. You could also say that something is overwhelming, oppressive, or crushing to convey the idea that you feel trapped or overwhelmed. Other possibilities include using terms like unendurable, overwhelming, or relentless to describe a situation that is beyond your ability to cope with. Ultimately, the choice of words will depend on the specific context and the emotions that you want to express.