LATIN DICTIONARYLexicon Latīnum
adjectivefirst/second-declension adjective

superarcanus

superarcanus (feminine superarcana, neuter superarcanum)

Meaning

  1. adjectivebeyond arcane, eminently secret
    Et supersedere vidit excelsissimas essentias, quantum in symbolis dicendum, post Deum, et circa Deum collocatas et cum Deo; omnibus etiam ipsis superarcane sublimiorem superprincipalem summitatem in medio superfirmatarum virtutum supercollocatam.1800, Hugh of St. Victor, edited by Jacques-Paul Migne, Exposition of St. Dionysius's Celestial Hierarchy, page 1113:

Declension

singular
formmasculinefeminineneuter
nominativesuperarcanussuperarcanasuperarcanum
genitivesuperarcanīsuperarcanaesuperarcanī
dativesuperarcanōsuperarcanaesuperarcanō
accusativesuperarcanumsuperarcanamsuperarcanum
ablativesuperarcanōsuperarcanāsuperarcanō
vocativesuperarcanesuperarcanasuperarcanum
plural
formmasculinefeminineneuter
nominativesuperarcanīsuperarcanaesuperarcana
genitivesuperarcanōrumsuperarcanārumsuperarcanōrum
dativesuperarcanīssuperarcanīssuperarcanīs
accusativesuperarcanōssuperarcanāssuperarcana
ablativesuperarcanīssuperarcanīssuperarcanīs
vocativesuperarcanīsuperarcanaesuperarcana

Origins

From super- (“over-”) + arcanus (“secret”).

Quick answers

What does superarcanus mean in Latin?
superarcanus, a adjective, means “beyond arcane, eminently secret”.