prejudicial

adjective3

1. •
   Exhibiting prejudice or bias.

   • I must believe that the absence of specific language in our Policy Book with respect to sexual preferences cannot be construed as encouragement to prejudicial behavior or treatment. — 1978
2. •
   Causing harm or injury; detrimental, harmful or injurious.

   • Were I to give you money, for whatever reason, it would be extremely prejudicial to your chances in court if you were unfortunate enough to appear there. — 2011
3. •
   Tending to convince based on past history rather than on evidence about the case at hand.