Where does “reasonability” come from?

reasonability (English) comes from English reasonable, from Old French resnable, from Latin ratiōnābilis, from Latin ratiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere — small stone, pebble; gravel, rubble.

reasonability (English): The state or quality of being reasonable;...

Definitions

  1. The state or quality of being reasonable;...

Ancestry of “reasonability”, step by step

reasonability traces back through two separate lines of ancestry.

via English reasonable

StepLanguageWordMeaning
1EnglishreasonableHaving the faculty of reason; rational,...
2Old Frenchresnablewise; intelligent
3Latinratiōnābilisrational, capable of reasoning
4Latinratiōreason, reasoning, explanation, ground, motive, rationality, rationale, purpose
5Latin-tiōtion, -ation, -ing
6Latindissertātiō(spoken) dissertation, discourse, disquisition
7Latindissertusarranged, disposed; explained
8Latindissereresecond-person singular future passive indicative...
9Latindis-asunder, apart, in two; reversal, removal;...
10Latincalceusshoe
11Latincalxlimestone; chalk; the finish line
12Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English ability

StepLanguageWordMeaning
1EnglishabilitySuitableness; The quality or state of being able;...
2Middle Englishabilitesuitability, aptitude, ability
3Old Frenchableté
4Latinhabilitāsability, aptitude, fitness
5Latinhabilisable to have/possess/maintain; having sufficient...
6Latin-ilis-ile
7Proto-Italic-elis
8Proto-Indo-European-elis
9Proto-Indo-European-lósForms agent nouns from verbal roots
Every word from Ancient Greek χάλιξ