How do you spell Insane

Available Definitions:
1)  a. - Exhibiting unsoundness or disorded of mind; not sane; mad; deranged in mind; delirious; distracted. See Insanity , 2.
2)  a. - Used by, or appropriated to, insane persons; as, an insane hospital.
3)  a. - Causing insanity or madness.
4)  a. - Characterized by insanity or the utmost folly; chimerical; unpractical; as, an insane plan, attempt, etc.