fallible          
adjective uk/ˈfæl.ə.bəl/ us/ˈfæl.ə.bəl/
 会犯错误的;容易出错的
able or likely to make mistakes
  We place our trust in doctors, but they are fallible like everyone else. 我们信任医生,但即使是他们也会犯错。 
  (物品或系统)易出毛病的,不可靠的
A fallible object or system is likely not to work in a satisfactory way.
  This method is more fallible than most because it depends on careful and accurate timing. 这种方法比大多数方法更容易出错,因为它需要仔细精确的计时。 
 Opposite: infallible