Unproficiency refers to a lack of skill or competence in a particular area. It can also be called incompetence, ineptness, or inadequacy. Another synonym for unproficiency is amateurishness, which suggests a lack of professional knowledge or experience. Clumsiness and awkwardness can also be used to describe unproficiency when it comes to physical tasks or actions. Additionally, deficiency, inferiority, and incapability convey a sense of insufficiency or incapacity. Unskillfulness might also be used to describe a lack of skill in a specific area. Regardless of the synonym used, unproficiency implies a need for improvement in order to achieve success or mastery.