English > insane: 2 senses > adjective 1| Meaning | Afflicted with or characteristic of mental derangement. |
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| Examples | - "was declared insane"
- "insane laughter"
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| Narrower | balmy, barmy, bats, batty, bonkers, buggy, cracked, crackers, daft, dotty, fruity, haywire, kooky, kookie, loco, loony, loopy, nuts, nutty, round the bend, around the bend, wacky, whacky | informal or slang terms for mentally irregular |
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| brainsick, crazy, demented, disturbed, mad, sick, unbalanced, unhinged | affected with madness or insanity |
| certifiable, certified | fit to be certified as insane (and treated accordingly) |
| crackbrained, idiotic | insanely irresponsible |
| crazed, deranged, half-crazed | Driven insane |
| fey, touched | slightly insane |
| hebephrenic | Suffering from a form of schizophrenia characterized by foolish mannerisms and senseless laughter along with delusions and regressive behavior |
| lunatic, moonstruck | insane and believed to be affected by the phases of the moon |
| maniacal, maniac | wildly / wildly disordered |
| manic-depressive | Suffering from a disorder characterized by alternating mania and depression |
| maniclike | resembling the mania of manic-depressive illness |
| mentally ill, unsound, unstable | Suffering from severe mental illness |
| non compos mentis, of unsound mind | not of sound mind, memory, or understanding |
| paranoid | Suffering from paranoia |
| psychopathic, psychopathologic, psychopathological | Suffering from an undiagnosed mental disorder |
| psychotic | Characteristic of or suffering from psychosis |
| raving mad, wild | talking / talking / talking or behaving irrationally |
| schizophrenic | Suffering from some form of schizophrenia |
| screw-loose, screwy | not behaving normally |
| See also | abnormal, unnatural | not normal |
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| irrational | not consistent with or using reason |
| unreasonable | not reasonable |
| Opposite | sane | mentally healthy |
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| Spanish | demente |
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| Nouns | insaneness | obsolete terms for legal insanity |
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| insanity | relatively permanent / permanent disorder of the mind |
| Adverbs | insanely | in an insane manner |
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