viperine

/ˈvaɪpəraɪn/
adjective
  1. Relating to or resembling a viper (a type of venomous snake).
    • Her viperine tongue and sharp words made everyone in the room uncomfortable.
    • The biologist studied the viperine features of the newly discovered species.
    • The viperine markings on the snake's back helped it blend into the dry leaves.
  2. Having the qualities of a viper; treacherous, spiteful, or venomous in behavior.
    • She gave him a viperine smile that promised revenge.
    • His viperine comments during the meeting destroyed any chance of cooperation.
    • The politician's viperine attacks on his opponent shocked even his supporters.
Antonyms
What does "viperine" mean? | whatsthatwordmean | whatsthatwordmean