insanity
noun
[ ɪnˈsanəti ]
• the state of being seriously mentally ill; madness.
• "he suffered from bouts of insanity"
Similar:
mental illness,
mental disorder,
mental derangement,
madness,
insaneness,
dementia,
dementedness,
lunacy,
instability,
unsoundness of mind,
loss of reason,
delirium,
hysteria,
mania,
psychosis,
craziness,
crazedness,
deliration,
Origin:
late 16th century: from Latin insanitas, from insanus (see insane).