pro·fun·di·ty /prəˈfʌndəti/
  深,深度,深奧,深刻,深厚
  Pro·fun·di·ty n.; pl. -ties   The quality or state of being profound; depth of place, knowledge, feeling, etc. “The vast profundity obscure.”
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  profundity
       n 1: wisdom that is recondite and abstruse and profound; "the
            anthropologist was impressed by the reconditeness of the
            native proverbs" [syn: reconditeness, abstruseness,
            abstrusity, profoundness]
       2: intellectual depth; penetrating knowledge; keen insight;
          etc; "the depth of my feeling"; "the profoundness of the
          silence" [syn: profoundness] [ant: superficiality]
       3: the intellectual ability to penetrate deeply into ideas
          [syn: astuteness, profoundness, depth]
       4: the quality of being physically deep; "the profundity of the
          mine was almost a mile" [syn: deepness, profoundness]
          [ant: shallowness]