Lewis & Short

incontanter and incontātus, v. incunct-.

in-cunctans, antis, adj., not delaying, unhesitating (eccl. Lat.): fides, Paul. Petr. Vit. S. Mart. 5, 233.
Adv.: in-cunctan-ter (incont-), without delay, unhesitatingly (post-class.); with fortiter, Lact. 6, 12: fateri, id. 1, 15, 26: incunctanter et liberius respondere, App. M. 9, p. 234, 5; Dig. 40, 2, 20 al.