1620s, "one side of a multi-sided body," from French facette (12c., Old French facete), diminutive of face "face, appearance" (see face (n.)). The diamond-cutting sense is the original one. Transferred and figurative use by 1820. Related: Faceted; facets.
he studied every facet of the question
faceless
face-lift
face-off
face-painting
face-plate
facet
facetious
face-value
facia
facial
-facient
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