4.9 Feminine words ending on o
There are a few words which ends on
, although they are feminine. In these cases the singular distinguish from the plural only by the article.
la radio => le radio
the radio => the radios
la moto => le moto
the motorcycle => the motorcycles
la foto => le foto
the photo => the photos
la biro => le biro
the ballpoint => the ballpoints
From this rule there is an exception and this exception is a very important word.
la mano => le mani
the hand => the hands