adjective \-ˈtī-riŋ\

: working very hard with a lot of energy for a long time : never seeming to get tired

Full Definition of UNTIRING

:  not becoming tired :  indefatigable <an untiring worker>
un·tir·ing·ly adverb

Examples of UNTIRING

  1. <the camel's reputation as an untiring beast of burden>
  2. <the detective's untiring investigation of the crime finally led to several arrests>

First Known Use of UNTIRING



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