The term "dis-inclination" refers to the lack of enthusiasm or interest in doing something. Its direct antonym would be "inclination," which denotes a strong desire or attraction towards a certain activity or task. Other antonyms could include "eagerness," "enthusiasm," "zeal," and "passion," all signifying a positive attitude towards a given matter. On the opposite end of the spectrum, synonyms for dis-inclination might include words like "aversion," "repulsion," "dislike," or "hatred," which describe an active dislike for a particular thing or activity. It's essential to keep in mind the context when looking for the right antonym as the phrase might have multiple meanings in different situations.