Lewis Short
(adverb) : dūplo
* Doubly, v. duplus fin.
Charlton T. Lewis, Charles Short, A Latin Dictionary
Lewis Short
(verb) : dūplo, āre, id.
* To double (only in jurid. Lat., for the class. duplico), Dig. 40, 12, 20; Gai. ib. 38, 10, 3; cf.: duplabis duplicabis, Paul. ex Fest. p. 76, 2 Müll.
Charlton T. Lewis, Charles Short, A Latin Dictionary