The word "twobit" is an outdated slang that has fallen out of use, typically meaning something or someone of low quality or insignificant value. Its antonyms, however, are still relevant in contemporary language. To describe something or someone of high quality or great importance, you can use antonyms such as outstanding, exceptional, first-rate, or excellent. In contrast to insignificant, antonyms include noteworthy, significant, important, or remarkable. Therefore, instead of using derogatory words like twobit, which diminishes the value of something or someone, using antonyms with positive connotations can express your admiration or appreciation for its real worth.