Final answer:
The correct term for a Nursing Assistant to use is "The weak side" when referring to a resident's weakened side during assistance with dressing, as it is accurate and non-judgmental.
Step-by-step explanation:
The appropriate way for a Nursing Assistant (NA) to refer to a resident's weakened side when assisting with dressing is to use positive and accurate terminology that does not convey judgment. The NA should refer to the side as "The weak side", which is descriptive without being negative or implying that one side is better than the other. It is essential to maintain the dignity of the resident and provide sensitive care.