Grice on "metabole" as implicature

polyptoton / metabole

one word is repeated in different grammatical or syntactical (inflected) forms. A special case of polyptoton is the figura etymologica which repeats two or more words of the same stem There hath he lain for ages, and will lie (Tennyson, The Kraken) […] love is not love Which alters when it alteration finds, Or bends with the remover to remove. (Shakespeare, Sonnet 116) – figura etymologica