the.com/duplicity

Saying one thing, meaning another, and billing both as sincerity.

means The practice of being deliberately two-faced — saying or promising one thing while believing or doing another.

from From Latin duplicitas, built from duplex, 'twofold' or 'double' (duo 'two' plus plicare 'to fold'). The image is literal: something folded in two, two layers where the eye expects one. English borrowed the word in the 1400s through French, and it kept the sense of a hidden second layer — a person presenting one face while folding another underneath it.

root
latin duplicitas, literally doubleness
not
simple lying, which lacks the charm offensive
sibling word
duplex, same root, less morally bankrupt
tell
consistency only in front of witnesses
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