Definitions of amiss:

• adverb:   in an improper or mistaken or unfortunate manner

  Example: "If you think him guilty you judge amiss"

• adverb:   in an imperfect or faulty way

  Example: "Miss Bennet would not play at all amiss if she practiced more- Jane Austen"

• adverb:   away from the correct or expected course

  Example: "Something went badly amiss in the preparations"