Amiss

adv.
  1. Astray; faultily; improperly; wrongly; ill.
  2. To take (an act, thing) amiss ,
    to impute a wrong motive to (an act or thing); to take offense at; to take unkindly; as, you must not take these questions amiss.

a.
  1. Wrong; faulty; out of order; improper; as, it may not be amiss to ask advice.

[Used only in the predicate.]
n.

  1. A fault, wrong, or mistake.