Under-the-counter refers to things that are sold or distributed secretly, illegally, or without proper authorization. Antonyms for this phrase include words like legal, authorized, aboveboard, overt, transparent, open, legal, legitimate, legitimate, and honest. Legal implies something that is recognized or permitted by law, whereas authorized suggests something that is approved or permitted by a legal authority. Aboveboard means something that is open and honest, whereas overt suggests something that is in plain sight or visible to everyone. Transparent refers to something that is clear and easily understood, and legitimate implies something that is lawful or genuine. Honest refers to someone who is truthful and sincere.