The antonyms for the word "art skillful" include words such as amateur, awkward, clumsy, inept, and unskilled. While art skillful is used to describe someone with an ability in the creative arts, the antonyms all describe a deficiency in those same areas. An amateur is someone who lacks professional training or expertise in a particular field. Awkward denotes a lack of grace, making it difficult to execute technical skills. Clumsy implies a lack of coordination or precision. Inept denotes an inability to learn or perform a task successfully. Lastly, unskilled means to lack the ability, knowledge, or expertise in a particular field.