This is the 213th most frequent Hungarian word.
nagy
"Big" or "large."
In this sentence, 'nagy' is used as an adjective describing the size or extent of the noun 'ház' (house), meaning 'big'.
Ez egy nagy ház.
This is a big house.
Here, 'nagy' is part of the compound word 'nagyapám,' meaning 'my grandfather.' It signifies a familial relationship ('big' father in the generational sense).
Nagyapám kertészkedett egész nap.
My grandfather was gardening all day.
In this example, 'nagy' means 'great' or 'intense' and describes the degree of dedication (odaadás) the person works with.