The word clunkier represents something that is awkward, heavy, or clumsy. So, the antonyms for clunkier will describe things that are sleek, lightweight or graceful. Some of the antonyms for clunkier are elegant, streamlined, nimble, agile, and refined. An elegant object has a pleasingly graceful and stylish appearance. Streamlined objects have a sleek and smooth design, making them more efficient and aerodynamic. When something is nimble, it is quick and light-footed enabling swift movements. Similarly, agile objects move with ease and grace. A refined object has been polished and perfected, making it sophisticated and stylish. These antonyms present a contrast to the awkwardness and heaviness associated with clunkier, highlighting the beauty and gracefulness of an object.