When it comes to expressing our thoughts, we often use words like "confine oneself to" to describe our limitations or constraints. However, it is important to have a wide vocabulary range to avoid repetition and monotony in writing or speaking. Some synonymous phrases to express the idea of restriction include "limit oneself to," "stick to," "adhere to," "stay within the confines of," "constrain oneself to," "bind oneself to," and "abide by." These phrases not only provide more variety but also allow us to convey our ideas more precisely. By diversifying our lexicon with synonyms, we not only elevate our communication skills but also make our conversations or written works more engaging and effective.