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[fath -uh m-lis] /ˈfæð əm lɪs/
impossible to measure the depth of; bottomless.
impossible to understand; incomprehensible:
fathomless motives.
Origin of fathomless
1600-10; fathom + -less
Related forms
fathomlessly, adverb Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for fathomless
  • In return for living a life of fathomless drabness, people's basic needs were reasonably well looked after.
  • Their rivalry is based in fathomless feelings of personal grievance.
  • The clay is white and of a pink and water appears fathomless as it appears to be entirely hollow under neath.
  • Galaxies spin and points of light congregate in fathomless dark spaces.
  • The clay is white and pink and water appear fathomless as it appears to be entirely hollow underneath.
  • Broke the fierce breath of the sun from the fathomless deeps of the heavens.
British Dictionary definitions for fathomless


another word for unfathomable
Derived Forms
fathomlessly, adverb
fathomlessness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for fathomless

1630s, literal; 1640s, figurative; from fathom + -less.

Online Etymology Dictionary, © 2010 Douglas Harper
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