English
grayschist
From gray + schist.
Proto-Germanic *grēwaz ‘grey’
Proto-West Germanic *grāg
Old English grǣġ ‘grey’
Middle English gray
English gray
Proto-Indo-European *skeyd- ‘to divide, split’
…
Ancient Greek σχίζω ‘to split’
Ancient Greek σχιστός ‘splittable’
Latin schistos lapis ‘the stone that is easy to split’
French schiste ‘shale, schist’
English schist
Today it means
noun gray schist
Language periods are conventional ranges, not dates for this word.
Etymograph / grayschist