non compos mentis
adjective [after verb] /ˌnɒnˌkɒm.pəsˈmen.tɪs/
/ˌnɑːnˌkɑːm.poʊsˈmen-/ Definition
› describes someone who is unable to think clearly, especially because of mental illness, and therefore not responsible for their actionsMental and psychiatric disorders
(Definition of non compos mentis adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus
© Cambridge University Press)
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