What is Unmessable?
1.
The quality of being able to stand in the face of any circumstance and not be thrown off course. Being "unmessable with" : someone who can generate possibility with anyone at anytime under any circumstance. "unmessable with-ness" : the quality of being unstoppable in the face of no agreement, able to turn lemons into lemonade.
Jane greeted every obstacle as an opportunity, she was truly unmessable with.