self-abasement
  自卑,自謙
  Self-a·base·ment n.
  1. Degradation of one's self by one's own act.
  2. Humiliation or abasement proceeding from consciousness of inferiority, guilt, or shame.
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  self-abasement
       n : voluntary self-punishment in order to atone for some
           wrongdoing [syn: penance, self-mortification]