In-competence is defined as the lack of ability or skill necessary to perform a task or job. There are several synonyms for in-competence that include ineptitude, inadequacy, incapacity, incompetence, inefficiency, and unskilled. Ineptitude and inadequacy refer to the inability to perform a task or meet expectations. Incapacity, incompetence, and inefficiency suggest a more general lack of ability, skill, or aptitude. Unskilled suggests a lack of training or experience. Each synonym for in-competence conveys a similar meaning but with slightly different implications. It's important to choose the most accurate synonym when describing someone's inability to perform a specific task or job.