Where does “nonreason” come from?

nonreason (English) comes from English reason, from Middle English resoun, from Anglo-Norman raisun, from Old French reson, from Latin ratiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus — small stone, pebble; gravel, rubble.

nonreason (English): Absence of reason

Definitions

  1. Absence of reason

Ancestry of “nonreason”, step by step

nonreason traces back through two separate lines of ancestry.

via English reason

StepLanguageWordMeaning
1EnglishreasonA cause
2Middle Englishresounresound; reason
3Anglo-NormanraisunAlternative form of reson
4Old Frenchresonlogic, logical reasoning
5Latinratiōreason, reasoning, explanation, ground, motive, rationality, rationale, purpose
6Latin-tiōtion, -ation, -ing
7Latindissertātiō(spoken) dissertation, discourse, disquisition
8Latindissertusarranged, disposed; explained
9Latindissereresecond-person singular future passive indicative...
10Latindis-asunder, apart, in two; reversal, removal;...
11Latincalceusshoe
12Latincalxlimestone; chalk; the finish line
13Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English non

StepLanguageWordMeaning
1EnglishnonObsolete form of none
2Frenchnonno; not; a no, a negative response
3Old Frenchnonno; not; Alternative form of nom
4Latinnōnnot
5Old Latinnoenum
6Proto-Indo-Europeanóynosone; single
Every word from Ancient Greek χάλιξ
nonreason — Etymology, Origin & Word History | Etymology Explorer