unfaithful

adjective6

1. •
   Not keeping good faith; disloyal; not faithful.
2. •
   Adulterous.
3. •
   Negligent or imperfect.

   • The painting was an unfaithful rendering of its subject.
4. •
   Not faithfully rendering the meaning of the source language; incorrect.
5. •
   Not honest or upright.
6. •
   Not having religious faith.