imperative

n. 命令、必要的事、規則、祈使語氣

a. 命令式的、急需的、勢在必行的、強制的

學術名詞

命令的：醫學
強制的：醫學

英文釋義

a mood that expresses an intention to influence the listener's behavior
some duty that is essential and urgent
a verb in the imperative mood.
requiring attention or action