Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
It's just as possible that runestones are a product of a civilization that came in a previous Kalpa, hence their existence in the Merethic era.
Source: https://gamerant.com/elder-scrolls-online-mysterious-case-runestones-lore-background/