Found 2 items, similar to indefatigableness.
English → English (WordNet) Definition: indefatigableness indefatigableness n : tireless determination [syn: indefatigability, tirelessness]
English → English (gcide) Definition: Indefatigableness Indefatigableness \In`de*fat"i*ga*ble*ness\, n. Indefatigable quality; unweariedness; persistency. --Parnell. [1913 Webster]