indefatigability
in·de·fa·tigability
noun
1.
Origin
Attested from the 1630s. Derived as a compound of indefatigable + -ity.
Related words
Broader terms
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.