inscrutableness
n. 难以理解,神秘莫测:指某事物或某人的行为、动机等难以理解或预测。
例句
It seemed to me that here was the key to her inscrutableness, the clue that if followed properly would make all her strangeness plain.
我似乎觉得,她神秘莫测的关键就在这里。这条线索,如果恰当地追寻下去的话,就能够使她的神秘感变得平实和简单起来。