fathomless.
Very deep (especially of water deeper than a lead line can measure); bottomless, immeasurable.
Meaning & usage
Very deep (especially of water deeper than a lead line can measure); bottomless, immeasurable.
unfathomable or incomprehensible.
Where this word comes from
Etymology tree English fathom Proto-Indo-European *lewh₁- Proto-Indo-European *lewHs-der. Proto-Germanic *leusaną Proto-Germanic *lausaz Proto-Germanic *-lausaz Proto-West Germanic *-laus Old English -lēas Middle English -les English -less English fathomless From fathom + -less.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.