Here's how we get the name:

* Ni: The symbol Ni represents the element Nickel.

* F: The symbol F represents the element Fluorine.

* 3: The subscript "3" indicates there are three Fluorine atoms in the compound.

* (III): The Roman numeral "(III)" indicates the oxidation state of Nickel is +3. This is because Fluorine has a -1 oxidation state, and to balance out the three Fluorine atoms with a total charge of -3, the Nickel atom must have a +3 charge.

Therefore, the full name of the compound is Nickel(III) fluoride.