mental illness
US /ˈmen.təl ˈɪl.nəs/
UK /ˈmen.təl ˈɪl.nəs/
1.
a condition that affects a person's thinking, feeling, or mood and that may affect his or her ability to relate to others and function on a daily basis
:
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He has been struggling with mental illness for years.
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Awareness of mental illness is growing.