Answer:
The effect of Roosevelt’s use of the words "loyal", "untiring", and "magnificently" in this excerpt is:
The use of strong descriptors makes everyday citizens sound like accomplished heroes.
Step-by-step explanation:
Roosevelt wants the regular citizen to feel seen and valued. When there is a war, it is not only the soldiers who have to make sacrifices - although they are indeed making the greatest sacrifice of all, which is risking their own lives. People of a country at war must face the challenge of going through rationing. They must give up their own comfort so that the country will have the necessary resources to keep on battling. Therefore, just like soldiers, they are heroes. That is what Roosevelt wants to convey when he compliments his audience by using strong words - "loyal", "untiring", and "magnificently".