Definition of unfathomable adjective from the Oxford Advanced Learner's Dictionary

     

    unfathomable

     adjective
    adjective
    BrE BrE//ʌnˈfæðəməbl//
     
    ; NAmE NAmE//ʌnˈfæðəməbl//
     
    (formal)
     
    jump to other results
  1. 1too strange or difficult to be understood an unfathomable mystery We are confronted with the unfathomable nature of human motivation.
  2. 2if somebody has an unfathomable expression, it is impossible to know what they are thinking
See the Oxford Advanced American Dictionary entry: unfathomable