What is the Spanish word for the number 30?

The Spanish word for the number 30 is "treinta." In the Spanish numbering system, "treinta" represents the exact value of thirty and is a standard term used universally in Spanish-speaking countries.

To better understand the context of the other options: "veinticinco" means twenty-five, which is the number 25; "veintiséis" translates to twenty-six, representing the number 26; and "veintiocho" means twenty-eight, corresponding to the number 28. Each of these terms pertains to numbers slightly lower than thirty, highlighting the unique designation of "treinta" for the value of 30 specifically.