mindmap root((疯狂)) insane implies that one is unable to function safely and competently in everyday life and is not responsible for one's actions: adjudged ~ after a period of observation. mad strongly suggests wildness, rabidness, ravings, or complete loss of self-control: drove her husband ~ with jealousy. crazy may suggest such mental breakdown as comes from old age or may suggest a distraught or wild state of mind induced by intense emotion: ~ with grief; when applied to a scheme, project, or notion, it usually suggests the product of a disordered mind: got those ~ ideas into her head. crazed often used instead of crazy, implies the existence of temporary disorder, usually with a specific cause: stampeding cattle ~ with fear. demented suggests mental unsoundness that manifests itself by apathy or incoherence in thought, speech, or action: years of solitary confinement had left him ~. deranged stresses a clear loss of mental balance or order resulting in a functional disorder: assassinated by a ~ anarchist. lunatic may be the equivalent of insane or may imply no more than extreme folly: invested in one ~ scheme after another. maniac is close to mad and often suggests violence, fury, or raving: once behind the wheel, she turns into a ~ driver.