This is the 11695th most frequent Russian word.
забора
"Забора" in English means "of the fence" (genitive case).
In this sentence, 'забору' (dative case of 'забор') refers to the physical wooden structure enclosing the garden.
Я подошел к старому деревянному забору, чтобы посмотреть на сад.
I approached the old wooden fence to look at the garden.
In this sentence, 'забора' (genitive case of 'забор') indicates the object being constructed.
Они начали строительство нового забора вокруг дома.
They began the construction of a new fence around the house.
Here, 'забора' (genitive case of 'забор') refers to the part of the fence that was affected physically.