ascetic
Concise Oxford English Dictionary © 2008 Oxford University Press:
ascetic /əˈsɛtɪk/
▶adjective characterized by the practice of severe self-discipline. ▶noun an ascetic person.
– derivatives
ascetically adverb,
asceticism noun.
ascetically adverb,
asceticism noun.
– origin C17: from med. L. asceticus or Gk askētikos, from askētēs ‘monk’, from askein ‘to exercise’.
'ascetic' also found in these Oxford entries:

