hermeticism

adjective

1. of or derived from Hermes Trismegistus and his lore
2. 1. magical; alchemic
   2. hard to understand; obscure

3. Origin: from use in alchemy

   completely sealed by fusion, soldering, etc. so as to keep air or gas from getting in or out; airtight
   also hermetical

Origin: ModL hermeticus < L Hermes < Gr Hermēs (trismegistos)