The antonym of "more four-star" would be "less four-star". Four-star indicates excellence, quality, or a high standard, so the opposite could be average, poor, or substandard. In the context of hospitality or cuisine, the antonym of four-star could be one-star, two-star, or three-star hotels or restaurants. These establishments, although still functional, would not meet the high standards associated with four-star ratings. In other contexts, such as academic grading, the antonyms of "more four-star" could be the lower grades such as D, E, or F. Antonyms help us broaden our vocabulary and understand words in different contexts.