English
etherealism
From ethereal + -ism.
A compound of ethereal + -ism
Proto-Indo-European *h₂eydʰ- ‘burn’
…
Ancient Greek αἴθω ‘to kindle’
Ancient Greek αἰθήρ ‘aether’
Ancient Greek αἰθέριος ‘of or pertaining to the upper air’
Latin aetherius ‘of or pertaining to the ether, the sky,…’
English ethereal
Today it means
noun The condition of being ethereal; ethereality
Language periods are conventional ranges, not dates for this word.
Etymograph / etherealism