monastic

Concise Oxford English Dictionary © 2008 Oxford University Press:
monastic/məˈnastɪk/

▶adjective relating to monks, nuns, etc., or the buildings in which they live.

■ resembling monks or their way of life, especially in being austere or celibate.

▶noun a monk or other member of a monastic order.

– derivatives
monastically adverb,
monasticism noun.

– origin ME: from late L. monasticus, from Gk monastikos, from monazein ‘live alone’.