(1)威胁;恐(恫)吓(utter a threat against)[T+n，T+n+prep (with)]：～the boss 威胁老板;a～ing letter 恐吓信;～the owner of the jewels with a gun/a revolver 用枪/手枪恫吓珠宝商;～the prisoners with beating 用殴打恐吓囚犯;～the lazy workers with physical punishment/dismissal/prosecution 用体罚/开除/起诉来威胁懒惰的工人;〖反〗protect，defend，guard;

(2)扬言要……(announce as possible)[T+n，T+to-inf]：～revenge/legal action 扬言要复仇/采取法律行动;～to murder/kill/beat sb 威胁说要谋杀/杀死/打某人;～to burn down the store/inform the government of sb's radical activities 扬言要烧毁商店/告知政府某人的激进活动;〖反〗protect，defend，guard;

(3)有征兆;可能发生(give signs or warning of;be likely to happen)[I+to-inf，T+n]：It～ed to rain. 天要下雨了。Dark skies～rain. 乌云密布要下雨。

(4)对……构成威胁，危及……(be a source of danger to sb/sth)[T+n]：(war)～the peace of the Middle East (战争)对中东和平构成威胁;(destruction of the rain forests)～the whole of our civilization (热带雨林的破坏)危及到整个人类文明;(immoral behavior /noisy traffic /floodwaters /landslides/drought)～people's life(不道德的行为/嘈杂的交通/水灾/塌方/干旱)对人们的生活构成威胁;

←threat n;

→′threatening adj 威胁的;恐吓的;′threateningly adv 威胁地;恐吓地