Princess is already in singular form. To make something posessive, you need to add either 's or '. Since the last letter of "princess" is an "s" the answer would be princess'.
The word said is less precise
whispered is more precise
eamed is precise
made is less precise
outgoing is more precise
nice is less precise
home is less precise
mansion is more precise
The answer to this problem would be a
Mr can be used negatively. For example,
"What do you think your doing Mr!"