To study at enough means to dedicate sufficient time and effort to learning and understanding a particular subject or topic. Some synonyms for this phrase include "master," "comprehend," "grasp," "absorb," "learn thoroughly," "assimilate," "understand completely," and "acquire knowledge." It is important to study at enough to ensure that one has a strong foundation and deep understanding of a subject, which can lead to better performance in exams and practical applications. Additionally, studying at enough can also help individuals develop critical thinking and problem-solving skills, which are valuable in any field of work.