English
subether
From sub- + ether.
Today it means
noun A fictional medium through which faster-than-light signals are able to travel.
Sources
Sources: Wiktionary, “subether”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.
Etymograph / subether