This is the 7163rd most frequent Portuguese word.
lana
Wool.
In this sentence, 'lã' refers to the material 'wool', used for making clothing.
Eu comprei um casaco de lã ontem.
I bought a wool coat yesterday.
Here, 'lã' describes the natural wool of the sheep, emphasizing texture.
Minha ovelha tem uma pelagem de lã macia.
My sheep has a soft wool fleece.
In this context, 'lã' is used as a crafting material, specifically wool thread or yarn.