The antonyms for the word "more undexterous" can be thought of as words that describe someone as being skilled or coordinated. Some of the opposite words for "undexterous" might include graceful, nimble, coordinated, agile, dexterous, adroit, skilled, or proficient. When we think of someone who is "undexterous," we might picture someone who is clumsy, awkward, or uncoordinated - someone who drops things, stumbles often or is always tripping over their own feet. On the flip side, someone who is "dexterous" has a natural ability to perform tasks with ease and precision, making them adept at a wide range of activities.