wicked

Then there were wicked, bitter howls from the young wolves: “Akela!

The whisper of his name makes their wicked tails cold.

When he had lifted one-third of himself clear of the ground, he stayed balancing to and fro exactly as a dandelion tuft balances in the wind, and he looked at Rikki-tikki with the wicked snake’s eyes that never change their expression, whatever the snake may be thinking of.

He jumped up in the air as high as he could go, and just under him whizzed by the head of Nagaina, Nag’s wicked wife.