This is the 6514th most frequent Spanish word.
caballero
Gentleman or knight.
Used here as a respectful form of address for a man, similar to 'sir' in English.
¡Hola, caballero! ¿En qué puedo ayudarle hoy?
Hello, sir! How can I assist you today?
Here, 'caballero' is used to describe a polite and considerate man, akin to 'gentleman' in English.
El caballero ayudó a la señora a cruzar la calle.
The gentleman helped the lady to cross the street.
In this sentence, 'caballero' refers to a knight, emphasizing the chivalric and noble qualities of the individual.