The phrase "can't take your eyes off" implies a sense of captivation or fascination with something or someone. Some synonyms for this phrase include "mesmerized," "entranced," "enraptured," "spellbound," "hypnotized," and "enthralled." Each of these words conveys a similar sense of being completely absorbed in something, whether it's a mesmerizing sunrise, a thrilling performance, or someone you find irresistible. "Mesmerized" suggests being held in a trance-like state by something alluring, while "spellbound" implies being held captive by a particular charm or enchantment. These words capture the captivating nature of being unable to look away from something.