ultimatum

/ˌʌltɪˈmeɪtəm/
noun
  1. A final demand or statement of terms, the rejection of which could result in a breakdown of relations or punitive action.
    • The government's ultimatum to the rebels expired at midnight, and troops prepared to move in.
    • She gave her boyfriend an ultimatum: either he stops gambling or she leaves him.
    • The company issued an ultimatum to the striking workers: return to work by Monday or face dismissal.
Antonyms
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