The antonyms for the term "wast economical" are quite numerous, and they all describe a person or behavior that is wasteful and inefficient. Some possible antonyms include wasteful, extravagant, profligate, spendthrift, uneconomical, and prodigal. These words all suggest a tendency to overspend or consume resources without regard for conservation or prudence, leading to unnecessary waste and high costs. In contrast to being economical, these antonyms reflect a carefree attitude toward resources and a lack of concern for future consequences. However, while some people may view these antonyms as negative traits, others may value them for their generosity, creativity, or hedonistic pleasure.