The antonyms for the word "extent" can be "limited," "restricted," "narrow," "confined," or "restrained." These words convey the opposite meaning of "extent," which refers to the degree or scope of something. For example, if we have limited resources, our extent of growth and development will be restricted. A narrow understanding of a complex issue may confine us to a limited perspective. A restrained attitude towards a situation may limit our extent of action. Therefore, antonyms provide us with a clear contrast to the meaning of a word, enabling us to understand and communicate effectively in various contexts.