This is the 4317th most frequent Catalan word.
gra
"Gra" in Catalan means "grain" or "kernel."
Here, the word 'gra' refers to a grain, specifically a single seed of wheat, in a literal sense.
El gra de blat és essencial per fer pa.
The grain of wheat is essential for making bread.
In this context, 'gra' refers to a pimple or spot, related to dermatology or skin conditions.
Aquest gra a la pell sembla ser una mica irritat.
This pimple on the skin seems to be a bit irritated.
Here, 'gra' is used figuratively to indicate the main or central point of an issue or topic.