Arcane and Undefined

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Arcane adjective - Having an often intentionally veiled or uncertain meaning.

Usage example: the rebate form uses arcane language, the only purpose of which seems to be to disqualify buyers from actually getting a rebate

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Undefined and arcane are semantically related. In some cases you can use "Undefined" instead an adjective "Arcane".

Undefined adjective - Not seen or understood clearly.

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Arcane and undefined are semantically related. Sometimes you can use "Arcane" instead an adjective "Undefined".

Cite this Source

Undefined and Arcane. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/arcane/undefined

Arcane & Undefined. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/arcane/undefined>.

Undefined or Arcane. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/arcane/undefined.

Google Ngram Viewer shows how "arcane" and "undefined" have occurred on timeline