Where does “aiccession” come from?

aiccession (Scots) comes from Latin accessio, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere, from Latin dis-, from Latin calceus, from Latin calx — small stone, pebble; gravel, rubble.

aiccession (Scots): accession act by which one power becomes party to engagements already in force

Definitions

accession act by which one power becomes party to engagements already in force

Ancestry of “aiccession”, step by step

Step	Language	Word	Meaning
1	Latin	accessio	approach; onset; increase, addition
2	Latin	-tiō	tion, -ation, -ing
3	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
4	Latin	dissertus	arranged, disposed; explained
5	Latin	disserere	second-person singular future passive indicative...
6	Latin	dis-	asunder, apart, in two; reversal, removal;...
7	Latin	calceus	shoe
8	Latin	calx	limestone; chalk; the finish line
9	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

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