Wiktionary
unturnable
a. Not turnable.
Usage examples of "unturnable".
He knew Garnett would die, no help for it now, unturnable, ridiculous, doomed with a festering, unseen wound.
The words were out before Kira could swallow them, but she was secretly glad she'd said it: too many people, herself included, tiptoed around the blind, stubborn Kai Winn as if she were a glacier, unturnable and irresistible.
Why, it was enough to turn his head--if he hadn't happened to have a head that was unturnable by girls, as far as she'd been able to observe.