Nine Rhetorical Devices - (2) Polyptoton

Via @culturaltutor and Wikipedia.

Polyptoton /ˌpɒlɪpˈtoʊtɒn/ is the stylistic scheme in which words derived from the same root are repeated (such as "strong" and "strength"). A related stylistic device is antanaclasis, in which the same word is repeated, but each time with a different sense.  Another related term is figura etymologica.

Example:

Absolute power corrupts absolutely.  

  - Lord Acton

Further examples:                                                                                                                                                                                                                                           

Who shall watch the watchmen themselves

  - Juvenal (Quis custodiet ipsos custodes)

Diamond me no diamonds, prize me no prizes… 

  - Alfred, Lord Tennyson, Lancelot and Elaine

The healthy man does not torture others—generally it is the tortured who turn into torturers. 

  - Carl Jung

With eager feeding food doth choke the feeder. 

  - William Shakespeare Richard II II, i, 37