What is the Spanish word for the number one?

The Spanish word for the number one is "uno." This term is a fundamental part of the Spanish numbering system, serving as the foundation for counting. In Spanish, the numbers are unique for each digit, and "uno" specifically represents the numeral one. It is essential for learners to recognize and be able to use this word as it often appears in various contexts, from simple counting to more complex arithmetic operations.

The other options represent different numbers: "dos" means two, "cuatro" means four, and "cinco" means five. Understanding these distinctions is crucial in mastering the basics of Spanish vocabulary related to numbers.