Adjective

• 1. pertaining to or characteristic of an ascetic or the practice of rigorous self-discipline;

  "ascetic practices"

• 2. practicing great self-denial;

  "Be systematically ascetic...do...something for no other reason than that you would rather not do it"- William James

  "a desert nomad's austere life"

  "a spartan diet"

  "a spartan existence"