Suffering from severe mental illness
English: mentally ill, unsound, unstable
unsoundEnglish
unsound, bad, fallacious, mentally ill, unfit
Adjective
Not in good condition, damaged or decayed
English: unsound
Containing or based on a fallacy
English: fallacious, unsound
3 more adjective senses
Not sound financially
English: unsound
Physically unsound or diseased
English: bad, unfit, unsound
Of e.g. advice
English: unsound