This is the 7474th most frequent Portuguese word.
mós
Millstones.
In this sentence, 'mós' refers to the millstones use in grinding grains.
As mós do moinho giravam lentamente.
The millstone of the mill turned slowly.
Here, 'mós' is used again with its literal meaning, indicating the importance of maintenance.
Cuide bem das mós para que o moinho funcione eficientemente.
Take care of the millstones so that the mill operates efficiently.
The word 'mós' points to the actual objects that were updated in terms of technology.