Where does “reasonableness” come from?

Reasonableness derives from English reasonable, from Old French resnable, from Latin rationabilis meaning capable of reasoning, ultimately from the Proto-Indo-European root h₂reh₁- meaning to think or count.

reasonableness (English): The state or characteristic of being reasonable;...

Definitions

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

Ancestry of “reasonableness”, step by step

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
Every word from Ancient Greek χάλιξ