tercero
third
tres
three
+
-ero
ordinal suffix
Tercero means third and can be thought of as tres0 (three0) + -ero1 (ordinal suffix1).
adjective
- thirdThird in a sequence or orderVivo en el tercer piso. // I live on the third floor.
noun
- thirdA person or thing in the third positionEl tercero en llegar ganó un premio. // The third to arrive won a prize.