noxious

/ˈnɑkʃəs/
adjective
  1. Harmful or poisonous to living things, especially by being toxic or causing disease.
    • Some plants produce noxious chemicals to protect themselves from insects.
    • The cleanup crew wore special suits to handle the noxious waste.
    • The factory released noxious fumes that made nearby residents sick.
  2. Morally harmful or offensive; corrupting.
    • The cult leader's noxious teachings led his followers to abandon their families.
    • Some critics argue that violent video games have a noxious influence on young minds.
    • The spread of noxious rumors destroyed the politician's reputation.