What is the meaning of palabra de honor in English?

"Palabra de honor" is a Spanish phrase that literally translates to "word of honor". It means a solemn promise or pledge given on one's honor. It is similar to saying "I swear" or "I give you my word" in English.

The phrase implies that the person making the promise is prepared to face serious consequences, including shame or loss of reputation, if they break their word. It is a very strong and binding statement of commitment.