Short answers, pulled from the story.
Boutros Boutros-Ghali coined the phrase cold peace in late 1982 while serving as a junior foreign minister. He later rose to become UN Secretary-General but used these words to describe a specific diplomatic state.
A cold peace refers to treaties that end active warfare yet leave deep domestic hostility intact between nations. This condition differs from a cold war where states support proxy conflicts against each other's allies because a cold peace does not involve formal incursions or open fighting between client states.
Public support for the agreement plummeted following the assassination of Anwar Sadat in 1981. Further damage occurred during the 1982 Israeli invasion of Lebanon, causing perception of the treaty to never recover among the Egyptian populace since then.
King Hussein threatened to annul the peace treaty if Israel did not provide an antidote for Khaled Mashal who was poisoned by two agents inside his office. Bill Clinton intervened to get Israel to reveal the antidote name and the Mossad operatives were released only after Israel agreed to free twenty-three Jordanian prisoners.
Land known as Al Ghamr transferred back to Jordanian control on the 10th of November 2019. King Abdullah II later warned Israel not to change holy site status during a December 2022 CNN interview regarding relations that he described as a cold peace that keeps getting colder.