Antonyms for the phrase "be captivated by" would be words that express a lack of interest or attraction towards something. Some examples of antonyms for this phrase are uninterested, bored, indifferent, apathetic, disinterested, unimpressed, and unaffected. These words denote a lack of emotional connection with something, either because it fails to engage a person's attention or because they have no emotional investment in it. Using these antonyms can help express a sense of detachment or an unwillingness to engage with a topic, idea, or person. Whether it's for literary or conversational purposes, having a variety of antonyms for "be captivated by" can help convey different shades of meaning and emotion.