Definition of "indefatigableness" []

• The state of being indefatigable. (noun)

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• "Jefferson paid awed and dismayed tribute to his “indefatigableness.”"
• "Republican part will give time to his talents and indefatigableness to extricate them."
• "What strikes one strongly in studying the pioneer is his sleeplessness, his indefatigableness, his persistency in pursuit of his object."