The phrase "more bright-eyed" expresses liveliness and enthusiasm. Some antonyms or opposite words for this phrase could be dull, listless, or tired. A dull and lethargic demeanor is the opposite of being bright-eyed and alert. Someone who is listless lacks energy or interest, while exhaustion may be the cause of being tired. A few other antonyms for the phrase could be melancholy, downcast, or glum. Melancholy signifies a state of sadness, while downcast reflects feelings of dejection or depression. Lastly, when someone is glum, they are typically in a state of low spirits or despondency.