Endangered: close to extinction: There are some animals in the world that are endangered.

Extinction: no longer existing: Dinosaurs have been extinct for thousands of years.

Undisputed: not challenged or question; Weak players are usually undisputed.

Ferocity: extremely fierce; His stiff postured and eyes had ferocity in him.

Mortified: to cause someone embarrassment, humiliated, or ashamed; After the prank, the boy felt mortified because of the classmates laughing. 

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