Nyet is a Russian word that means "no." In English, its antonyms could include "yes," "affirmative," "positive," or "agree." Other antonyms for "nyet" could be "pro," which means "for" in Russian, or "positive," which means "optimistic" or "upbeat." Additionally, "approve," "consent," "accept," and "confirm" are all antonyms of "nyet," as they indicate a positive response or agreement. In general, "nyet" is a negative response to a question or request, and its antonyms are words that signify a positive or affirmative response.