The term "under table" refers to something that's hidden or secret. The antonyms for this phrase could include "openly," "transparently," or "above board." These terms connote honesty, integrity, and trust. Something that's done under the table may be illegal or unethical, so the antonym would be something that's lawful and ethical. Synonyms for "under the table" include "clandestine," "covert," or "surreptitious," so antonyms would be the opposite of these words. Using "under table" to describe something may imply a level of deceit or dishonesty, so it's important to choose antonyms that communicate trustworthiness and openness.