[syn: ascetic, ascetical, austere, spartan]
The Collaborative International Dictionary of English v.0.48:
ascetical \ascetical\ adj.
   1. pertaining to or characteristic of an ascetic ascetical
      practices
   Syn: ascetic
        [WordNet 1.5]
   2. practicing great self-denial.
   Syn: ascetic, austere, spartan
        [WordNet 1.5]
              Be systematically ascetic . . . do . . . something
              for no other reason than that you would rather not
              do it.                              --William
                                                  James.
        [1913 Webster]
WordNet (r) 3.0 (2006):
ascetical
    adj 1: pertaining to or characteristic of an ascetic or the
           practice of rigorous self-discipline; "ascetic practices"
           [syn: ascetic, ascetical]
    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" [syn:
       ascetic, ascetical, austere, spartan]