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Synonyms

fathom

American  
[fath-uhm] / ˈfæð əm /

noun

PLURAL

fathoms

PLURAL

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


verb (used with object)

  1. to measure the depth of by means of a sounding line; sound.

  2. to penetrate to the truth of; comprehend; understand.

    to fathom someone's motives.

fathom British  
/ ˈfæðəm /

noun

  1. a unit of length equal to six feet (1.829 metres), used to measure depths of water

  2. mining a unit of volume usually equal to six cubic feet, used in measuring ore bodies

  3. forestry a unit of volume equal to six cubic feet, used for measuring timber

"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

verb

  1. to measure the depth of, esp with a sounding line; sound

  2. to penetrate (a mystery, problem, etc); discover the meaning of

"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

Other Word Forms

  • fathomable adjective
  • fathomer noun
  • unfathomable adjective
  • unfathomed adjective

Etymology

Origin of fathom

First recorded before 900; Middle English fathme, Old English fæthm “span of outstretched arms”; cognate with German Faden “six-foot measure,” Old Norse fathmr; akin to Latin patēre “to stand open” ( patent )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"It's been an unbelievable year for us. We still don't really fathom everything that is going on," he said.

From BBC

Meanwhile, Umar's family and neighbours are still trying to fathom what happened.

From BBC

This is rocking Britain in a way Americans may struggle to fathom if their frame of reference is U.S. public broadcasting.

From The Wall Street Journal

He declined, but I couldn’t quite fathom how he was going to get home so late at night.

From Los Angeles Times

“It is hard to fathom McKinley’s swing from one end of the imperial spectrum to the other in less than a year,” Mr. Jackson writes.

From The Wall Street Journal