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This is a good word when you don't want to insult but you would like to tell someone they're being a little double minded. It is marked or characterized by deceitfulness in speech or conduct, as by speaking or acting in two different ways to different people concerning the same matter.

It ultimately is from a noun of Latin origin, duplicitās (stem duplicitāt-), formed from the adjective duplex (stem duplic-) “twofold, double, folded double; deceitful.” Duplex is a compound of duo “two” and the Latin adjective suffix –plex (stem –plic-), which has the same function (and same Proto-Indo-European origin) as the English suffix –fold (as in twofold). The first recorded meaning of duplicitous in English is in U.S. law: “including two or more offenses in one count, or charge, as part of an indictment, thus violating the requirement that each count contain only a single offense"

An example sentence could be:


Rather, like his own duplicitous identity, Mark Twain’s texts are double-voiced.

Happy studying!