unappealable adjective. 
[ʌnǝ'pi:lǝb(ǝ)l] M17.[from UN-1 + APPEALABLE.]Chiefly 
Law. Not able to be appealed against.
■ Gladstone The judgments of this Pope..are unappealable and irreversible. ■   unappealableness noun (
rare) 
M17. ■   unappealably adverb M19. ■   unappealed ppl adjective (
Law) (of a judgement etc.) not appealed against, uncontested (also foll. by 
from) 
L19.  [TahlilGaran] English Dictionary ▲