Arcane
Arcane adjective - Difficult for one of ordinary knowledge or intelligence to understand.
Unknown
Unknown adjective - Happening or existing without one's knowledge.
Arcane and unknown are semantically related. Sometimes you can use "Arcane" instead an adjective "Unknown".
Nearby Words: unknowable, unknowing
Mutual synonyms
Both words in one sentence
- General bans on arcane magic aren't unknown in some places, though in at least one famous case (Mystara's wizard-ruled Principalities of Glantri) that's replaced with a strict prohibition on clerical magic instead.
Source: The Dark Arts -
Hax VS Cheat: Whoever loses, we win.DATELINE: November 22nd, 2008, location unknown—Out of darkness, from one of the deep arcane corners of the Internet, a man emerges.
Source: Machinima / The Gmod Idiot Box -
There are also devices powered by "unknown forces" and about the only thing we know about them is that they're not any of the others, that they're not any kind of arcane magic (at least so far as the Ziguranth can tell), and that the Sher'Tul made extensive use of them.
Source: Video Game / Tales of Maj'Eyal
Cite this Source
Unknown and Arcane. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/arcane/unknown
Arcane & Unknown. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/arcane/unknown>.
Unknown or Arcane. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/arcane/unknown.
Google Ngram Viewer shows how "arcane" and "unknown" have occurred on timeline