This is the 5802nd most frequent Arabic word.
مريضا
Sick.
In this sentence, 'مريضا' is used in the accusative form to denote the condition of 'being ill' of a specific entity (the patient).
أخبر الطبيب المريض بأنه سيحتاج إلى الراحة.
The doctor told the patient that they would need rest.
Here, 'مريضا' is used as a predicate to describe the state of the subject 'you' as sick or unwell.
لا يمكنك الذهاب إلى المدرسة إذا كنت مريضا.
You cannot go to school if you are sick.
In this context, 'مريضا' is used attributively to describe the noun 'man' as someone who is ill.