Unthriftinesses refer to wastefulness, extravagance, or squandering of resources. The antonyms for this word, therefore, are frugality, thriftiness, and economy. Frugality is the quality of being economical with resources, avoiding waste and being careful with money. Thriftiness is also characterized by prudence, carefulness, and the habit of saving money. Economy refers to the efficient use of resources, with the aim of minimizing waste and maximizing productivity. These antonyms highlight the importance of responsible use of resources, both personal and societal, as well as sustainable approaches to consumption and production.