Exhibiting unsoundness or disorder of mind; not sane; utterly mad.
Used by or relating to insane people.
an insane hospital
Causing insanity or madness.
Were such things here, as we doe speake about? / Or haue we eaten on the insane Root, / That takes the Reason Prisoner?
From Latin īnsānus (“unsound in mind; mad, insane”), from in- + sānus (“sound, sane”), equivalent to in- + sane.
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