Knowhow refers to expertise or skill in a particular field. Its antonyms, on the other hand, are phrases that express lack of knowledge or skill. Among these antonyms are phrases like ignorance, incompetence, and cluelessness. Ignorance is the lack of knowledge or information about a particular subject. Incompetence refers to the inability to do something correctly or effectively. Cluelessness, on the other hand, means lacking knowledge or understanding of a situation or concept. Other antonyms for knowhow include ineptitude, inefficiency, and awkwardness. These words express the opposite of the expertise and skill that the word knowhow conveys.