Less refined, less cultured, less sophisticated, less polished, less elegant, less gracious, less genteel, less mannerly, less well-bred, less tasteful. These are all antonyms for the phrase "more ungenteel". In simpler words, if someone is being uncivilized or impolite, they are opposite to genteel or refined. The usage of antonyms can often help in understanding the real meaning of a word. For example, if someone is being impolite, they can be described as "less genteel", giving an idea of the opposite of being polite and cultured. Antonyms are a vital tool in understanding and expressing the English language more precisely.