Borrowed from Latin duplex ( “ double, two-fold ” ) , from duo ( “ two ” ) + plico ( “ fold together ” ) ; compare the roots of διπλόος ( diplóos , “ double ” ) ; compare also πλέκω ( plékō , “ twist, braid ” ) . By surface analysis , duo- + -plex .
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Lewis’s Elementary Latin Dictionary
1890 American Book Company edition; pinned Perseus XML digitizationduplex
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Borrowed from Latin duplex .
Borrowed from Latin duplex , see above.
Unadapted borrowing from Latin duplex .
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 ) .
Borrowed from French duplex .
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