Where does “rhesymoldeb” come from?

rhesymoldeb (Welsh) comes from Welsh rhesymol, from Welsh rheswm, from Middle English resoun, from Anglo-Norman raisun, from Old French reson, from Latin ratiō, from Latin -tiō, from Latin dissertātiō — small stone, pebble; gravel, rubble.

rhesymoldeb (Welsh): reasonableness

Definitions

reasonableness

Ancestry of “rhesymoldeb”, step by step

Step	Language	Word	Meaning
1	Welsh	rhesymol	reasonable
2	Welsh	rheswm	reason, cause
3	Middle English	resoun	resound; reason
4	Anglo-Norman	raisun	Alternative form of reson
5	Old French	reson	logic, logical reasoning
6	Latin	ratiō	reason, reasoning, explanation, ground, motive, rationality, rationale, purpose
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

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