- capacity : total amount available .
- concentration : a large amount of something .
- counteract : to work against .
- deterioration : the situation of becoming worse .
- diagnose : to identify an illness .
- disorder : a disease or illness .
- gravity : seriousness .
- impaired : damage or weakened .
- mood : a feeling , a state of mind .
- regulate : to control .
indicate : to show .
- stimulate : to cause a response .
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