expertness
ex·pert·ness
noun
1.
skillfulness by virtue of possessing special knowledge
Origin
From expert + -ness.
Related words
Broader terms
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.