Discipliner

noun

Definitions

Noun
  1. 1
    Agent noun of discipline: one who disciplines. agent, form-of

    "[T]he punisher believes that the suffering she inflicts "somehow offsets" the (perceived) wrongdoing, but even the indignant discipliner (if suffering is what the discipliner inflicts) simply in order to attain a result: in order to educate, prevent, and so on."

Etymology

From discipline + -er.

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