Simple past tense and past participle of threaten, adjective_ ecology, of a plant or animal At risk of becoming endangered in the near future, Feeling insecure or vulnerable, At risk of becoming extinct or of becoming an endangered species. Used of a plant or animal species
Being in a condition or situation where life or serious harm is possible; in danger; at risk, (of flora or fauna) in imminent danger of extinction, in danger, at risk, said of something where there is a strong possibility something bad will happen to it (for example, a species in danger of going extinct), verb_ Simple past tense and past participle of endanger