ˌpälə̇pˈtōˌtän noun
( plural polypto·ta -ōd.ə)
Etymology: Late Latin, from Greek polyptōton, neuter of polyptōtos using many cases of the same word, from poly- + -ptōtos (from piptein to fall, influenced in meaning by Greek ptōsis case) — more at symptom
: the rhetorical repetition of a word in a different case, inflection, or voice in the same sentence (as in Tennyson's “my own heart's heart, and ownest own, farewell”)