mis-take / məˈstāk noun
  1. an error; an incorrect answer or decision
Failure is the way to success; each mistake teaches us something. Morihei Ueshiba, 1883-1969  
  1. a judgment proven wrong due to inattention or lack of knowledge
The biggest mistake of past centuries in teaching has been to treat all students as if they were variants of the same individual and thus to feel justified in teaching them all the same subjects the same way. Howard Gardner, 1943- verb
  1. to confuse one thing for another; to misinterpret
Don’t ever mistake my silence for ignorance, my calmness for acceptance or my kindness for weakness. Dalai Lama, 1935-  
  1. to make a blunder
I mistook the way. Simone de Beauvoir, 1908-1986