from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Obsolete form of indefatigable.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Indefatigable.

from The Century Dictionary and Cyclopedia

  • Indefatigable.


Sorry, no etymologies found.


  • At the beginning of his practice he was not considered what might be termed brilliant, but the fact that he was employed on over two hundred cases within the first two years of his practice proves the secret of his success to have been his undefatigable energy.

    Hidden Treasures Or, Why Some Succeed While Others Fail

  • I missed the Oscar-nominated Happy-Go-Lucky last year, about a woman whose response to the travails of the world around her was undefatigable cheeriness.


  • His quiet grace and undefatigable determination opened the eyes of entire prison, defeated an evil system, and saved Red's life.

    Entertainment Weekly's PopWatch


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