Word of the day · 19 June 2026
arcane
/ɑːˈkeɪn/
adjective
Understood by few; mysterious or secret because of specialized knowledge.
In a sentence
- Only two engineers knew the arcane restart sequence.
- The footnote explained an arcane point of medieval law.
- Fans traded arcane trivia about early recordings.
In an image
Origin
From Latin arcanus (secret, hidden), from arca (chest, box).
History
Arcane once leaned toward occult secrecy; modern use covers any insider lore. Tax codes, game rules and lab methods can all feel arcane to outsiders. The chest image still helps: something stored away from general view. Call a subject arcane and you admit it takes initiation to follow.
Nearby words
esoteric · obscure · recondite
Knowledge kept behind a narrow door.