Majorly is an adverb used to emphasize the extent or importance of something. Antonyms for this word include "slightly," "minimally," "marginally," and "moderately." Slightly refers to a small degree, while minimally means the lowest level possible. Marginally indicates a small difference or improvement, and moderately refers to a degree that is not extreme. These antonyms help to communicate the opposite meaning of majorly and are useful in situations where you need to convey a different level of emphasis or importance. Using these antonyms can help to add more variety to your writing and make your language more precise.