Tra từ imperative - Từ điển Oxford Advanced Learner 8th

im·pera·tive [imperative imperatives] adjective, noun BrE [ɪmˈperətɪv] NAmE [ɪmˈperətɪv]
adjective
1. not usually before noun (formal)very important and needing immediate attention or action
Syn: ↑vital
•~ (that…) It is absolutely imperative that we finish by next week.
•~ (to do sth) It is imperative to continue the treatment for at least two months.
2. (formal)expressing authority
•an imperative tone
3. only before noun (grammar)expressing an order
•an imperative sentence

Word Origin:
late Middle English (as a grammatical term): from late Latin imperativus (literally ‘specially ordered’, translating Greek prostatikē enklisis ‘imperative mood’), from imperare ‘to command’, from in- ‘towards’ + parare ‘make ready’.

Language Bank:
vital
Saying that something is necessary
It is vital that ▪ journalists can verify the accuracy of their reports.
▪ Journalists play a vital ▪ / crucial ▪ role in educating the public.
▪ Public trust is a crucial ▪ issue for all news organizations.
▪ The ability to write well is essential ▪ for any journalist.
▪ The Internet has become an indispensable ▪ tool for reporters.
▪ In journalism, accuracy is paramount ▪. / …is of paramount importance ▪.
It is imperative that ▪ journalists maintain the highest possible standards of reporting.
Synonyms at ↑essential
Language Banks at ↑emphasis, ↑impersonal

Example Bank:
•The collapse of the wall made it imperative to keep the water out by some other means.
•We consider it absolutely imperative to start work immediately.
•It is imperative for your recovery to continue the treatment for at least two months.

noun
1. (formal)a thing that is very important and needs immediate attention or action
•the economic imperative of quality education for all
2. (grammar)the form of a verb that expresses an order; a verb in this form
•In ‘Go away!’ the verb is in the imperative.
•‘Go away!’ is an imperative.

Word Origin:
late Middle English (as a grammatical term): from late Latin imperativus (literally ‘specially ordered’, translating Greek prostatikē enklisis ‘imperative mood’), from imperare ‘to command’, from in- ‘towards’ + parare ‘make ready’.