subternatural
/ˌsʌbtəˈnatʃ(ə)rəl/ /ˌsʌbtəˈnatʃ(ə)r(ə)l/adjective
Below what is natural or normal; less than natural. Also as noun (with the): that which is subternatural.
Origin
Mid 17th century; earliest use found in Thomas Vaughan (1621–1666), hermetic philosopher and alchemist. From subter- + natural.