A noun is a word referring to a person, animal, place, thing, feeling or idea (e.g. man, dog, house).
noun(f) means that a noun is feminine. Spanish nouns have a gender, which is either feminine (like la mujer or la luna) or masculine (like el hombre or el sol).
You cannot get the foot of Charlemagne' s mother, Berthe au grand pied (Berthe Big-Foot), into Cinderella' s slipper.
No, no conseguirán que entre el pie de Berta, la de los pies grandes, la madre de Carlomagno, en el zapato de Cenicienta.