This is the 2211th most frequent Russian word.
грунта
"Грунта" in English translates to "soil" or "ground."
The word "грунт" refers to 'soil', indicating the material composition of the ground.
Грунт в этом саду очень плодородный.
The soil in this garden is very fertile.
In this sentence, "грунта" refers to the 'soil' on the Martian surface (a scientific perspective).
Учёные взяли образцы грунта с поверхности Марса.
Scientists took soil samples from the surface of Mars.
Here, "грунт" is used in an artistic context referring to a 'base layer' or 'primer' applied before painting.