Lewis Short
(adjective) : percontātīvus (percunct-), a, um, percontor
* Universally known (postclass.), Cael. Aur. Tard. 4, 8, 114.
* In gram., interrogative: modus,Diom. p. 328 P.—Adv.: percontātīvē, inquiringly, Charis. p. 161 P.
Charlton T. Lewis, Charles Short, A Latin Dictionary