Antonyms for "more healthy looking" would include words such as "unhealthy," "sickly," "pale," "dull," and "haggard." Unhealthy refers to a state of being not well, a lack of vitality or wellbeing. Sickly can mean looking frail, weak, or in poor health. Pale refers to a lack of color or vitality, while dull suggests lack of shine or brightness. Haggard means looking tired and worn out, often a reflection of poor health or lack of sleep. All of these words are the opposite of "more healthy looking," which connotes a sense of vitality, brightness, and good health.