Authorise : give official permission for or approval to (an undertaking or agent).Pulverize : reduce to fine particles.Prescribe : (of a medical practitioner) advise and authorize the use of (a medicine or treatment) for someone, especially in writing.Detach : disengage (something or part of something) and remove it.Proscribe : forbid, especially by law.Antonym of Authorise is Proscribe