Undexterous is a word that describes someone who lacks the skill or agility required to carry out a particular task effectively. Therefore, the antonyms for undexterous are words that convey the opposite meaning. These antonyms are nimble, skillful, dexterous, adroit, deft, capable, agile, proficient, competent, and expert. These words describe someone who possesses the necessary skills and abilities to handle a task with ease and finesse. While undexterous individuals struggle with even simple tasks, individuals who possess these antonymous qualities can perform even the most complicated duties with remarkable ease and efficiency.