The antonym for the word "art wasteful" is "productive" or "efficient." These terms imply that something is a worthwhile investment and contributes positively to a specific goal or outcome. For instance, when we say that a process is productive, it means that it is efficient, generates output, and delivers value. This contrasts with wastefulness, where resources, energy, and time are expended with minimal or no output to show for it. While art can be a valuable expression of creativity, when it becomes wasteful, it fails to deliver the intended purpose, which involves creating something of value. Therefore, it's crucial to focus on the antonyms of wastefulness to create positive outcomes.