Censorship is inimical to freedom. So, most teenagers would argue, are curfews. To be inimical is to be harmful, antagonistic, or opposed to — like smoking two packs a day is to healthy lungs.
Inimical comes from the Latin word inimicus, meaning "enemy." It suggests acting like someone's enemy––being adverse, damaging, or downright hostile. It can refer to anything from emotions and actions to public policy. Be careful not to mix it up with inimitable, which means too good to be copied.