Intenable is a word used to describe a situation or position that is difficult or impossible to maintain. There are several synonyms that can be used in place of intenable, such as unsustainable, unfeasible, impractical, unworkable, nonviable, and untenable. These words all suggest that something is not practical or viable in the long term, and cannot be maintained or sustained for any length of time. For example, a company may be pursuing an intenable business model that is unlikely to succeed in the long term. In such a situation, the company would need to find a more sustainable and viable approach to achieve its goals.