This is the 5166th most frequent Portuguese word.
osso
Bone.
Here, 'osso' is used metaphorically in the phrase 'osso duro de roer,' meaning a challenging problem or situation.
Isso foi um osso duro de roer.
That was a tough nut to crack.
In this case, 'osso' is presented abstractly as a word, focusing on its linguistic characteristics.
Osso é uma palavra com uma pronúncia interessante.
Bone is a word with an interesting pronunciation.
In this sentence, 'osso' refers to a physical bone, typically associated with anatomy.