Etymology
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figment (n.)

early 15c., "something invented or imagined, a myth or fable; deceitful practice; false doctrine," from Latin figmentum "something formed or fashioned, creation," related to figura "shape" (from PIE root *dheigh- "to form, build"). Related: Figmental; figmentary.

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non-entity (n.)

also nonentity, c. 1600, "something which does not exist, a figment," from non- + entity. Meaning "a person or thing of no consequence or importance" is attested from 1710.

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