This is the 4390th most frequent French word.
grain
Grain: Seed or small hard particle of a cereal plant or substance.
In this instance, 'grain' represents a kernel or seed, specifically of wheat used as food.
Le grain de blé est essentiel pour fabriquer du pain.
The wheat grain is essential for making bread.
This sentence uses 'grain' to refer to a small particle, specifically sand.
Le grain de sable est petit mais peut bloquer une grande machine.
The grain of sand is small but can block a large machine.
Here, 'grain' refers to texture or the detailed surface often of materials or skin.