The word un-quenchable is often used to describe something that cannot be extinguished, put out or satisfied. Opposites of un-quenchable include terms like quenchable, satiable, extinguishable, solvable, manageable, and resolvable. So, anything that is quenchable can be put out or extinguished easily, while satiable describes something that can be satisfied, put to rest or quelled. Consequently, when applied to thirst, hunger or desire, it means that they can be satisfied by getting what they need. On the other hand, when discussing challenges or problems, the opposite of un-quenchable would refer to an issue that can be solved, managed, dealt with or put under control.