The opposite of the word "more multifaceted" would be "less complex" or "simpler." Other possible antonyms include "limited," "singular," "restricted," and "homogeneous." These words suggest a lack of diversity and variety, in contrast to the complexity and multiple facets of the original term. By using these antonyms, one can convey a sense of simplicity, clarity, or even boredom, depending on the context. For example, a person might describe a basic, straightforward task as "less multifaceted" than a complex, multi-layered project. Understanding the antonyms for "more multifaceted" can help you communicate your ideas more precisely and effectively in a variety of contexts.