Promising words? (3)

I believe the answer is:

ido

(Other definitions for ido that I've seen before include "Wedding promise" , "International language" , "Words made up" , "Wedding response" , "Prepared tongue" .)

I've seen this clue in the King Feature Syndicate.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.