Final answer:
The highest priority nursing action in caring for an adult client with injuries resulting from intimate partner abuse who does not wish to report the violence to law enforcement authorities is to assess the client's immediate safety and develop a safety plan.
Step-by-step explanation:
When caring for an adult client with injuries resulting from intimate partner abuse who does not wish to report the violence to law enforcement authorities, the highest priority nursing action is to assess the client's immediate safety and develop a safety plan. The safety of the client is of utmost importance in this situation. Encouraging the client to file a police report, contacting the client's family members, and documenting the injuries and the client's refusal to involve law enforcement are all important actions, but they are not the highest priority.