Where does “unjudicable” come from?

unjudicable (English) comes from English judicable, from Latin iūdicābilis, from Latin iūdicō, from Latin iūdex, from Latin iūs, from Latin dīcō, from Latin -tiō, from Latin dissertātiō — small stone, pebble; gravel, rubble.

Ancestry of “unjudicable”, step by step

unjudicable traces back through two separate lines of ancestry.

via English judicable

Step	Language	Word	Meaning
1	English	judicable	Capable of being judged; capable of being tried...
2	Latin	iūdicābilis	susceptible of judgement; judgeable
3	Latin	iūdicō	to examine judicially, judge, pass judgement, decide; condemn
4	Latin	iūdex	judge
5	Latin	iūs	law, right
6	Latin	dīcō	to say, talk, speak, utter, mention
7	Latin	-tiō	tion, -ation, -ing
8	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
9	Latin	dissertus	arranged, disposed; explained
10	Latin	disserere	second-person singular future passive indicative...
11	Latin	dis-	asunder, apart, in two; reversal, removal;...
12	Latin	calceus	shoe
13	Latin	calx	limestone; chalk; the finish line
14	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

via English un

Step	Language	Word	Meaning
1	English	un	One

Every word from Ancient Greek χάλιξ →Every word from Latin -tiō →Every word from Latin dis- →