expatiative

From expatiate +‎ -ive.

expatiative (comparative more expatiative, superlative most expatiative)

1. Expatiatory, diffusive, expansive.
   • 1820, Sophocles, “Œdipus Tyrannus; or, Swellfoot the Tyrant. A Tragedy, in Two Acts. […]”, in Percy Bysshe Shelley, transl., edited by [Mary] Shelley, The Poetical Works of Percy Bysshe Shelley. […], new edition, London: Edward Moxon […], published 1840, →OCLC, Act I, page 184:

     But my Leech—a leech / Fit to suck blood, with lubricous round rings, / Capaciously expatiative, which make / His little body like a red balloon, / As full of blood as that of hydrogen, / Sucked from men's hearts; […]