凶猛 (xiōng měng): fierce; violent; ferocious

Last summer, I encountered a fierce wild boar in the mountains. It suddenly rushed out from the bushes, frightening me so much that I quickly climbed a tree to hide.

Fierce sharks often appear in this area of the sea, so the government prohibits tourists from swimming in the water.

He was like a fierce lion, leaving his opponent speechless in the debate competition.

Although this virus is tiny, it is extremely fierce and can make many people fall ill in a short time.