This is the 1185th most frequent Portuguese word.
cores
Colors.
Here, 'cores' means 'colors' and refers to the various colors observed in a rainbow.
As cores do arco-íris são vibrantes e bonitas.
The colors of the rainbow are vibrant and beautiful.
In this sentence, 'cores' again means 'colors', used to describe the variety of paint colors applied to the house.
Ele pintou a casa com diferentes cores.
He painted the house with different colors.
'Cores' here is used metaphorically to describe the typical hues seen in nature during the autumn season.