unfaithful

adj

Etymology: From Middle English unfeithful, equivalent to un- + faithful.

1. Not having religious faith.
2. Not keeping good faith; disloyal; not faithful.
3. Adulterous.
4. Not honest or upright.
5. Negligent or imperfect.

   “The painting was an unfaithful rendering of its subject.”

6. Not faithfully rendering the meaning of the source language; incorrect.