Adjective
(comparative more undefatigable, superlative most undefatigable)
- Obsolete form of indefatigable.
undefatigable
English Wiktionary. Available under CC-BY-SA license.
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"undefatigable." YourDictionary, n.d. Web. 15 January 2019. <https://www.yourdictionary.com/undefatigable>.
APA Style
undefatigable. (n.d.). Retrieved January 15th, 2019, from https://www.yourdictionary.com/undefatigable
