This is the 3669th most frequent Swedish word.
fötterna
"The feet" (plural form).
Here, 'fötterna' denotes the specific body part 'feet' in plural form, used to describe physical discomfort.
Jag har ont i fötterna efter att ha gått hela dagen.
My feet hurt after walking all day.
In this sentence, 'fötterna' refers to the feet in the imperative command addressed to another person.
Kan du lyfta fötterna så att jag kan dammsuga under soffan?
Can you lift your feet so I can vacuum under the sofa?
Fötterna is used here to specifically describe the condition of the feet after an activity.