Ostentatiousnesses refers to a flamboyant or showy display of wealth and luxury, but there are many antonyms that express the opposite sentiment. Modesty, simplicity, humility, and frugality are all words that directly contrast ostentatiousnesses. These words convey a sense of measured restraint and a rejection of unnecessary extravagance. Other antonyms include understatement, understated elegance, and refined subtlety, which emphasize the beauty and nuance of more subtle displays of wealth and status. Ultimately, there are many ways to express wealth and luxury without resorting to ostentatiousnesses, and these antonyms provide a useful vocabulary for those seeking a more restrained and elegant approach to their lifestyle.