Adjective: viperous vI-pu-rus
- Marked by deep ill will; deliberately harmful
"Her viperous comments hurt everyone around her";
- poisonous, venomous, vicious, malicious
- Of, pertaining to, or resembling a viper
"The snake's viperous head was triangular in shape";
- viperine
- Malicious or spiteful
"He gave a viperous look before storming out of the room";
- viperine
See also: beady-eyed, bitchy [informal], cattish [informal], catty [informal], despiteful [archaic], leering, malevolent, spiteful, venomed, vindictive, vixenish