Where does “grism” come from?

grism (English) comes from English grating, from English -ing, from Old English -ing, from Old English -tūn, from Old English tūn, from Proto-West Germanic tūn, from Proto-Germanic tūną, from Gaulish dunum — smoke; mist, haze.

grism (English): A combination of diffraction grating and prism...

Definitions

  1. A combination of diffraction grating and prism...

Ancestry of “grism”, step by step

grism traces back through two separate lines of ancestry.

via English grating

StepLanguageWordMeaning
1EnglishgratingHarsh and unpleasant; Abrasive; tending to annoy;...
2English-ingUsed to form gerunds, a type of verbal nouns,...
3Old English-ingForming nouns from verbs, indicating action,...
4Old English-tūnhomestead, village, town
5Old Englishtūnenclosure, yard; place; dwelling
6Proto-West Germanictūnfence
7Proto-Germanictūnąfence; enclosure
8Gaulishdunumfort; hill, hillfort
9Proto-Celticdūnomstronghold, rampart
10Proto-Indo-Europeandʰewh₂-smoke; mist, haze

via English prism

StepLanguageWordMeaning
1EnglishprismA polyhedron with parallel ends of the same size...
2Late Latinprismaprism
3Ancient GreekπρίσμαAnything sawn, sawdust; A prism
4Ancient Greek-μᾰ"suffix forming a noun denoting the result of an...
5Proto-Indo-European-mn̥Creates action nouns or result nouns from verbs
Every word from Proto-Indo-European dʰewh₂-
grism — Etymology, Origin & Word History | Etymology Explorer