However, depending on the context, you could use prefixes to convey related meanings:
* Un-: To indicate the opposite, like "unbearable".
* In-: Similar to "un-", but sometimes used with more abstract concepts, like "inbearable" (though this word isn't commonly used).
* Super-: To indicate something exceeding the limits of bearable, like "superbearable" (this is a more informal use).
* Pre-: To indicate something before becoming bearable, like "prebearable" (again, not a standard word).
You could also use a different word entirely that conveys the intended meaning, such as "tolerable", "endurable", or "manageable".