adjective
[more ~; most ~] :not sane: such as
having or showing severe mental illness
unable to think in a clear or sensible way
c - used in the phrase drive/make (someone) insane to describe annoying or bothering someone very much.
wild and uncontrolled
[more ~; most ~] :very foolish or unreasonable :crazy
used for people who have severe mental illnesses
go insane
to become mentally ill :to go crazy
usually used in an exaggerated way
the insane
insane people :people who have severe mental illness