Unwieldily is an adjective used to describe something that is difficult to manage or handle because of its size, weight, or complexity. Some opposite words of unwieldily include practical, manageable, nimble, light, and effortless. Practical implies easy to use or execute, whereas manageable refers to something that can be easily controlled or maneuvered. Nimble means quick and light in movement or action, while light is a term applied to something that is less in weight. Effortless is used to describe something that is easy to achieve without the application of much effort. These antonyms of unwieldily are handy words for describing things that are easy to use or manage.