Wiktionary
a. (context usually of an emotion English) Impossible to assuage
Usage examples of "unassuageable".
She watched her darling's last sleep, and cared nothing for cold or violence or shame or death or the unassuageable anguish of hate and love that made all the air about her bitter.
Someone who hated all of the Nagarian blood with an unrelenting, unassuageable hate.
Her tears had awakened him to the agony of unassuageable longing he would carry around forever.
It was not a nothingness that possessed her when she was not making love but rather a terrible, aching, unassuageable sadness that went beyond anything I had encountered.
He was aware of ghost tingles in long-since lost magnetohydrodynamic limb and was tortured by an unassuageable, systemic hunger for a fluid environment.
She subsided into sobbing which racked her body like unassuageable grief.
With unassuageable regret I ran through a couple of other messages on the tape and I told one or two people about Jogger.