vaniloquium

From vānus (“empty”) +‎ loquor (“to speak”) +‎ -ium.

vāniloquium n (genitive vāniloquiī or vāniloquī); second declension

1. idle talk

Second-declension noun (neuter).

¹Found in older Latin (until the Augustan Age).

• “vaniloquium”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• "vaniloquium", in Charles du Fresne du Cange’s Glossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
• vaniloquium in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.