invaluable
in·va·luable
adjective
1.
having incalculable monetary worth
Origin
From in- + valuable (compare priceless). Piecewise doublet of unvaluable.
Related words
Word family
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.