Final answer:
The suffix -noia in the term paranoia refers to 'mind,' originating from Greek, indicating conditions or disorders related to the mental state or intellect.
Step-by-step explanation:
The suffix -noia in the term paranoia means mind. It is derived from the Greek word noos or nous, which refers to the mind or intellect. Therefore, when talking about the condition of paranoia, it is related to disorders of the mind, where the individual might have irrational fears or delusions, particularly of persecution or grandeur. However, the suffix itself -noia specifically refers to the mind, not the particular symptoms or fears associated with paranoia.