Wiktionary
unbudgeable
a. That cannot be made to budge; immovable, fixed.
Usage examples of "unbudgeable".
The lowland Lao may have been richer, more numerous, and politically more powerful, but the Hmong, peering down at their putative masters like eagles looking at mice, always managed to maintain an unbudgeable sense of superiority.
She tried to reposition the camera -- pulled, twisted, wrenched, pounded, but the supergluey velcro strip was unbudgeable, the camera permanent.