"Tom finds the sun tolerable. The sun is tolerable to Tom. Tom can tolerate the sun."
"Tom is able to endure the sun. Tom finds the sun able to be endured."
"Able to be endured" is passive voice. "Able to endure" is active voice.
'Tolerable' doesn't mean 'able to endure'. Can you give an example of one of those instances when you found it meant that?
Student or Learner