- another word for unfathomable
WordReference Random House Unabridged Dictionary of American English © 2025
fath•om•less
(faᵺ′əm lis),USA pronunciation adj.
fath′om•less•ly, adv.
- impossible to measure the depth of;
bottomless. - impossible to understand;
incomprehensible:fathomless motives.
- fathom + -less 1600–10
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