fathom

[fath-uh m]

noun, plural fath·oms, (especially collectively) fath·om.

a unit of length equal to six feet (1.8 meters): used chiefly in nautical measurements. Abbreviation: fath

verb (used with object)

to measure the depth of by means of a sounding line; sound.
to penetrate to the truth of; comprehend; understand: to fathom someone's motives.

Nearby words

  1. fatherhood,
  2. fatherland,
  3. fatherless,
  4. fatherly,
  5. fathogram,
  6. fathomable,
  7. fathometer,
  8. fathomless,
  9. fatidic,
  10. fatigable

Origin of fathom

before 900; Middle English fathme, Old English fæthm span of outstretched arms; cognate with German Faden six-foot measure, Old Norse fathmr; akin to patent

Related formsfath·om·a·ble, adjectivefath·om·er, nounun·fath·om·a·ble, adjectiveun·fath·omed, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unfathomed


British Dictionary definitions for unfathomed

fathom

noun

a unit of length equal to six feet (1.829 metres), used to measure depths of water
mining a unit of volume usually equal to six cubic feet, used in measuring ore bodies
forestry a unit of volume equal to six cubic feet, used for measuring timber

verb (tr)

to measure the depth of, esp with a sounding line; sound
to penetrate (a mystery, problem, etc); discover the meaning of
Derived Formsfathomable, adjectivefathomer, noun

Word Origin for fathom

Old English fæthm; related to Old Frisian fethem outstretched arms, Old Norse fathmr embrace, Old High German fadum cubit, Latin patēre to gape

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

Word Origin and History for unfathomed
Online Etymology Dictionary, © 2010 Douglas Harper