Joy is to ecstasy as sorrow is to what?

The relationship between "Joy" and "Ecstasy" is one of degree; ecstasy represents a heightened or intensified state of joy. Applying this same analogy to the second part of the question, we are looking for a term that reflects a heightened state of "Sorrow."

The term "Sorrow" itself, as chosen, is consistent with this pattern because it is the base emotion from which we would derive a more intense form. In this analogy, if we were to continue it logically, the more intense or strong version of sorrow could be "grief" or "mourning," but since those options are not provided, selecting "Sorrow" maintains the core concept of comparing emotional intensities within the original framework.

This choice emphasizes the idea that just as ecstasy is a more profound experience of joy, sorrow in its unmodified form serves as the foundation for a deeper emotional experience associated with sadness.