different between unfired vs untired

English

un- +? fired

unfired (comparative more unfired, superlative most unfired)

From un- +? tired.

untired (comparative more untired, superlative most untired)

Not tired; unwearied.
- 1796, Samuel Taylor Coleridge, Religious Musings
  Contemplant Spirits! ye that hover o'er
  With untired gaze the immeasurable fount
  Ebullient with creative Deity!
Alternative form of untyred (“not fitted with tyres”)
- 1877, The Automotive Manufacturer (volume 18, page 132)
  Do not allow untired wheels to remain on the floor of the smith-shop, unless there is a current of air passing under the floor of the shop.

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