Gimcrack refers to something that is showy, but cheap and of poor quality. Antonyms for more gimcrack would include terms like, refined or elegant, which emphasize a certain level of sophistication and quality. Other antonyms might include simple, minimalist, or understated, which suggest a lack of flashy embellishments altogether. Words such as genuine or authentic, which suggest something that is true and authentic, would also be considered antonyms. Ultimately, the word "gimcrack" conjures up images of things that are gaudy and over-the-top; its antonyms, by contrast, paint a picture of things that are tasteful, classy, and genuine.