detrimental◼◼◼(causing damage or harm) adjective [UK: ˌde.trɪ.ˈmen.tl̩] [US: ˌde.trɪ.ˈmen.tl̩]
nefarious◼◼◻(sinful, villainous, criminal, or wicked, especially when noteworthy or notorious for such characteristics) adjective [UK: nɪ.ˈfeə.rɪəs] [US: nə.ˈfe.riəs]