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English definition of “fathomless”

fathomless

adjective uk   /ˈfæð.əm.ləs/ literary us  

fathomless adjective (DEEP)

too deep to be measured: a fathomless oceanfigurative She gazed into the fathomless depths of his brown eyes.Unlimited

fathomless adjective (MYSTERIOUS)

impossible to understand: I'm afraid it's a fathomless mystery.Difficult to understandComplicated and difficult to doPuzzle and confuse
(Definition of fathomless from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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