Wiktionary
unpliable
a. Not pliable.
Usage examples of "unpliable".
Her very lips were stiff and unpliable with the force of the blood which rushed to her head.
All our failures here proceed from bad education, want of capacity, or a perverse and unpliable disposition.
Cardona knew that the thorn must have come from some peculiar tropical tree, for it was as unpliable as a metal nail.