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fathom

[ fath-uhm ]
/ ˈfæð əm /
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See synonyms for: fathom / fathomed / fathoming / fathoms on Thesaurus.com

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.
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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

OTHER WORDS FROM fathom

fath·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. 2022

How to use fathom in a sentence

British Dictionary definitions for fathom

fathom
/ (ˈfæðəm) /

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 forms of fathom

fathomable, 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
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