nonvaluation means failure to assign a value to something. Lexicurio rates it Sui generis — a strength score of 95 out of 100.
Etymology
From non- + valuation.
noun
- Failure to assign a value to something.“Significant, too, is the manuscript's introduction of the concept of place value (1s, 10s, 100s, etc.) and the use of zero as a stand-in, or placeholder, in the event of a nonvaluation.”