Where does “nonrigorous” come from?

nonrigorous (English) comes from English non, from French non, from Old French non, from Latin nōn, from Old Latin noenum, from Proto-Indo-European óynos — one; single.

nonrigorous (English): Not rigorous

Definitions

  1. Not rigorous

Ancestry of “nonrigorous”, step by step

nonrigorous traces back through two separate lines of ancestry.

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

via English rigorous

StepLanguageWordMeaning
1EnglishrigorousShowing, causing, or favoring rigour;...
2EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
3Middle Englishnesse
4Old Englishnæsnot, not at all; not; first/third-person singular...
5Proto-Germanicnasjąfoothill; headland; cape
6Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European óynos