Adorld for ever be the God unseen, Which round the sun revolves this vast machine,
Though to his eye its mass a point appears:
Ador'd the God that whirls surrounding spheres,
Which first ordain'd that mighty Sol should reign
The peerless monarch of th' ethereal train:
Based on your understanding of its meaning, select the root of the word ethereal.
Old English äther, "one or the other"
Greek aither, "upper air"
Latin dies, "day"
-jal, "of or related to"