The antonyms for the word "becoming inattentive" can be described as the state of being alert or attentive. Some words that can be used as antonyms for inattentive are vigilant, mindful, observant, focused, attentive, alert, watchful, and attentive. These words describe a person who is actively engaged in the task at hand, paying full attention to their surroundings, and is fully aware of what is happening. Being attentive can help improve productivity, increase performance, and minimize errors. Therefore, it's essential to cultivate the habit of being vigilant and alert to avoid becoming inattentive or losing focus.