köken: Etymology tree Proto-Indo-European *dwóh₁ Proto-Balto-Slavic *duwōˀ Proto-Slavic *dъva Old Polish dwa Polish dwa Polish -isty Polish dwoisty From dwa + -isty.
köken: Equivalent to duo (“two”) + -plex (“-fold”). Possibly inherited from Proto-Italic *dupleks, if Umbrian 𐌕𐌖𐌐𐌋𐌀𐌊 (tuplak) is cognate (however, its meaning is uncertain and its form poses some difficulty). The Italic form may be an analogical alteration (with the du- of duo replacing *dwi-) of an original Proto-Indo-European *dwi-pleḱ-s; compare Ancient Greek δίπλαξ (díplax).
aile: duplicō
Duplex omnīnō est iocandī genus, ūnum illīberāle, petulāns, flāgitiōsum, obscēnum, alterum ēlegāns, urbānum, ingeniōsum, facētum.