im·per·a·tive /ɪmˈpɛrətɪv/
 命令,誡命,需要,規則,祈使語氣(a.)命令式的,急需的,勢在必行的,強制的


 im·per·a·tive /ɪmˈpɛrətɪv/ 形容詞
 必須的,緊急的,難忍的,強制的


 imperative
 *命令式


 Im·per·a·tive a.
 1. Expressive of command; containing positive command; authoritatively or absolutely directive; commanding; authoritative; as, imperative orders.
    The suit of kings are imperative.   --Bp. Hall.
 2. Not to be avoided or evaded; obligatory; binding; compulsory; as, an imperative duty or order.
 3. Gram. Expressive of command, entreaty, advice, or exhortation; as, the imperative mood.


 Im·per·a·tive, n. Gram. The imperative mood; also, a verb in the imperative mood.

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 imperative
      adj 1: requiring attention or action; "as nuclear weapons
             proliferate, preventing war becomes imperative";
             "requests that grew more and more imperative" [ant: beseeching]
      2: relating to verbs in the imperative mood
      n 1: a mood that expresses an intention to influence the
           listener's behavior [syn: imperative mood, {jussive
           mood]
      2: some duty that is essential and urgent