The antonym for the word "in-expert" would be "expert". When someone is described as being "in-expert," it means they lack experience or knowledge in a particular area. However, an expert is a person who is highly skilled and knowledgeable in a particular field, and they have years of experience under their belt. An expert has a deep understanding of the subject matter they work with and is highly respected for their skills and knowledge. They are often called upon to offer advice, mentorship, and guidance to others. In contrast, someone who is in-expert may need assistance and guidance themselves in order to improve their knowledge and skills.