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English definition of “unfathomable”

unfathomable

adjective uk   /ʌnˈfæð.ə.mə.bl̩/ formal us  
impossible to understand: For some unfathomable reason they built the toilet next to the kitchen.Difficult to understandComplicated and difficult to doPuzzle and confuse
unfathomably
adverb uk   /-bli/ formal us  
(Definition of unfathomable from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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