The word for “straight” in Spanish is “recto” when referring to a direction or a line. For example, if you want to say “Go straight ahead,” you would say “Sigue recto.”
However, if you are referring to something being straight in the sense of not being curved or bent, you can also use the word “derecho.” For instance, “Keep your back straight” would be “Mantén tu espalda derecha.”
It’s important to note that the context in which you use the word will determine which term is more appropriate. Both “recto” and “derecho” are commonly used, but they can have slightly different connotations depending on the situation.