Ineptio, ineptis, ineptiui, incptîre Ter. To trisle: to doe or speake a thing vnmeete for the purpose.
Lewis and Short: Latin dictionary
ĭneptĭo, īre, v. n. [id.], to talk or act absurdly, to trifle, play the fool (poet.): ineptis, Ter. Ad. 5, 8, 11; id. Phorm. 2, 3, 73: desinas ineptire, Cat. 8, 1.