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Note added at 19 mins (2023-05-18 08:38:32 GMT)
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ultimatum:
a threat in which a person or group of people are warned that if they do not do a particular thing, something unpleasant will happen to them. It is usually the last and most extreme in a series of actions taken to bring about a particular result.

EX: He gave her an ultimatum - she could either stop seeing Peter and come back to him or it was divorce.
EX: On Wednesday night the UN issued its toughest ultimatum to date, demanding that all troops withdraw from the city.
https://dictionary.cambridge.org/dictionary/english/ultimatu...

ultimatum
واژه مصوب: اتمامِ حجت
تعریف: اخطار کتبی نهایی دولتی به دولت دیگر در مورد انجام دادن کاری یا برآوردن خواسته‏ای که عدم توجه به آن ممکن است به جنگ یا اقدامات خصمانه منجر شود
https://abadis.ir/entofa/ultimatum/

ultimatum
[حقوق] اتمام حجت، آخرین پیشنهاد، اولتیماتوم
https://abadis.ir/entofa/ultimatum/

The terrified Yazid knew full well that Imam Hussain had a great amount of influence, and that what started as a small stand with his family and companions could become a stand of tens of thousands of people. Thus, Yazid gave Hussain an ultimatum. Either obey him or die.
https://www.saba.ye/en/news3198059.htm


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Note added at 28 mins (2023-05-18 08:47:36 GMT)
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اتمام حجت دونالد ترامپ برای سخت تر کردن توافق هسته ای، آزمونی برای متحدان اروپایی
Trump's Ultimatum to Toughen Nuclear Deal Tests European Allies
https://foreignmedia.farhang.gov.ir/fa/article/15209/اتمام-ح...

to give someone an ultimatum
با کسی اتمام حجت کردن، کلام یا حرف آخر را به کسی زدن
https://dic.b-amooz.com/en/dictionary/rw?word=اولتیماتوم داد...