This is the 482nd most frequent Spanish word.
tercer
"Third" (ordinal number).
Here, 'tercer' is used as an ordinal number to indicate position or sequence, modifying the noun 'intento' (attempt).
Es mi tercer intento para obtener éxito.
It is my third attempt to achieve success.
In this case, 'tercer' describes the ordinal position of the floor within a multi-story building.
Vivo en el tercer piso del edificio.
I live on the third floor of the building.
Here, 'tercer' specifies the order of years within a sequence, emphasizing continuity.