This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Alternative form of eremitic.

adj. characterized by ascetic solitude

adj. of or relating to or befitting eremites or their practices of hermitic living

"Simon, who had then lived a recluse twenty years, imitating the Macariuses and Arseniuses in the most heroic practices of penance and contemplation, was much affected with the devotion of these servants of God to the blessed Virgin, their edifying deportment, and their eremitical austere institute, and joined their holy company before the end of the year 1212."

unworldly   

eremitic