Synonyms for the phrase "be inattentive to" include "neglect," "ignore," "overlook," "disregard," "omit," "brush off," "tune out," "forget," "slight," and "fail to notice." These words suggest a lack of focus or attention towards something, whether it be a task at hand or someone trying to communicate with you. Being inattentive can have negative consequences, leading to missed opportunities, miscommunication, and even danger. It's important to stay alert and engaged in our surroundings, especially in situations where our attention is required. Utilizing these synonyms can help concretize the importance of paying attention and remaining present.