Final answer:
The appropriate term to refer to the weaker side of a person who has had a stroke is the 'affected side.'
Step-by-step explanation:
The appropriate term to refer to the weaker side of a person who has had a stroke is the affected side. When a stroke occurs, it can cause damage to one side of the brain, resulting in weakness or impairment on the opposite side of the body. This is why the term 'affected side' is commonly used to describe the weaker side of a person after a stroke.