arcana

arcana is a Latin form of arcanus, meaning “secret, hidden; (arcana) secrets, mysteries”. It is the accusative plural neuter adjective.

Found 100 times in the Latin texts on Socratos.

Where it is used

Cicero, de Finibus Bonorum et Malorum 2.84: … ladea amicitia multorum te benivolentia praeclare tuebere et munies. At quicum ioca seria, ut dicitur, quicum arcana, quicum occulta omnia?

Martial, Epigrammata 5.84.4: Arcana modo raptus e popina,

All forms of arcanus (declension table)

Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.