ascetic
a-scet-ic
adjective
Characterised by severe self-discipline and abstention from all indulgence.
"He lived an ascetic life, rejecting all luxuries."
noun
A person who practises severe self-discipline and abstention.
"The old ascetic meditated in his simple cell."
Thesaurus
Synonyms: abstemious, spartan, austere, ascetical, abstainer