Etymology

unproof

U1N1P3R1O1O1F4

Today it means: Absence or lack of proof or evidence; prooflessness. Full definition →

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unproof · noun1

From un- (“absence or lack of”) + proof.

unproof · verb2

From un- + proof (“resiliency, firmness”).

Etymology from Wiktionary, CC BY-SA 4.0.