Etymology

fathomless

F4A1T1H4O1M3L1E1S1S1

Today it means: Very deep (especially of water deeper than a lead line can measure); bottomless, immeasurable. Full definition →

Proto-Germanic *lausaz ← Proto-Indo-European *lewHs- ← English fathom
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The story

  1. Englishfathom
  2. Proto-Indo-European*lewh₁-
  3. Proto-Indo-European*lewHs-
  4. Proto-Germanic*leusaną
  5. Proto-Germanic*lausaz
  6. English todayfathomless

From fathom + -less.

Etymology from Wiktionary, CC BY-SA 4.0.