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fathom

fathom

10 6.5
A unit of length equal to six feet used to measure water depth
  • noun
  • /ˈfæðəm/
  • Specialized
translation icon : braza
  • We're down to 60 fathoms of line left, sir!
  • depth in fathoms
  • 4-fathom
  • 100 fathoms

Examples

Idioms

To understand how serious or important something is

Compounds

square fathom
  • Archaic
9.1

An area the size of a square six feet on each side

How Long

fathom
  • Specialized
10 6.5
ell
  • Archaic
9.9
yard
1.0
foot
1.0
inch
1.0

Surface Forms

fathom singular
fathoms plural

Etymology

The word fathom comes from an old English word fæðm meaning 'outstretched arms' or 'embrace'. Sailors used the distance of a man's arm span to measure depth, so a fathom became a unit of about six feet for water depth.