What's the difference between imperative and impetrative?

Imperative

Definition:

(a.) Expressive of command; containing positive command; authoritatively or absolutely directive; commanding; authoritative; as, imperative orders.
(a.) Not to be avoided or evaded; obligatory; binding; compulsory; as, an imperative duty or order.
(a.) Expressive of commund, entreaty, advice, or exhortation; as, the imperative mood.
(n.) The imperative mood; also, a verb in the imperative mood.

Example Sentences:

(1) It is imperative that NPs know how to assess for victimization and safety and that they provide patients with needed information about community services.
(2) Old lefties who have failed to understand the imperatives of electoral politics for 40 years are never going to change their minds.
(3) In order to reduce the devasting effects of enteric diseases among children born to mothers in tropical countries of Africa and Asia, it is imperative that all health workers understand the cultural and social perceptions of their clients towards the disease in question.
(4) Future research imperatives should include differentiating between depressive symptoms and diagnoses, investigating the use of interviewer-administered measures of depression as screening tools, and investigating the relationships between depression, physiologic disease, and use of health services.
(5) What’s imperative from an organizational standpoint, he added, is “understanding where voters are, what their concerns are, and building a sophisticated operation around that.
(6) Emergent management is imperative for convulsive tonic-clonic (grand mal) status epilepticus, but there are nonconvulsive types of status epilepticus in which the problem is more one of correct diagnosis than emergent management.
(7) In order to discriminate between these two activities and optimize potentially therapeutic ribozymes, it is imperative to develop in vivo assays in which the antisense activity of ribozymes is negligible.
(8) Its recognition is imperative in the overall management of the trauma patient.
(9) In short, there is a cultural imperative to love the panda that even the pandapathetic find hard to ignore.
(10) To empower these nurses to respond effectively, it is imperative that the profession be reclarified as a specialty with a distinct philosophy and mission.
(11) She says: "There is a democratic imperative for the arts to show why the hard-pressed taxpayer – struggling with the cost of living crisis – should fund the arts.
(12) Monti introduced balanced budgets into the Italian constitution, effectively neutering its provisions for social need's precedence over market imperatives.
(13) It is imperative that health professionals have accurate knowledge about HIV infection and feel comfortable as they educate parents and children about this major health problem confronting society.
(14) Performance differences between simple and selective response tasks appear to depend not upon differential preparation, but upon selective processing of the imperative signal, which is reflected in the N120 component of the visual evoked response to that signal.
(15) Therefore, early aggressive management of persistently draining wounds after TKA is imperative.
(16) The delay of voiding until imperative desire to urinate must be avoided.
(17) In 3 patients with an imperative indication for conservative surgery a second tumor occurred in the kidney: 2 were treated with further parenchyma sparing operations, while in 1 with poor physical condition no further measures were possible.
(18) Light-emitting diodes (LEDs) were used as the warning stimulus (S1) and the imperative stimulus (S2), and a different electrode was placed on Cz according to the international 10-20 system.
(19) That is to say, besides the obviously imperative therapeutic action, a prophylaxis is also a necessity.
(20) Finally, the rapidly expanding problem of the acquired immunodeficiency syndrome among some minority populations provides both an imperative and an opportunity to learn how model prevention programs should be designed and executed.