Where does “nonslam” come from?

nonslam (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.

Ancestry of “nonslam”, step by step

nonslam 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 slam

StepLanguageWordMeaning
1EnglishslamTo shut with sudden force so as to produce a...
2Middle Englishslammen—
Every word from Proto-Indo-European óynos →