The phrase "more chambered" implies the presence of multiple compartments, rooms or sections. Antonyms for "more chambered" could include words such as "single," "unitary," "homogeneous," or "undivided." Such words convey the idea of a single entity that lacks any form of division or segmentation. Other possible antonyms might include "simple," "basic," "uncomplicated," or "plain," suggesting an absence of complexity or variation. In contrast, words like "complex," "intricate," "multifaceted," or "varied" would imply a high degree of differentiation and elaboration, possibly involving multiple compartments or sub-components. Ultimately, the choice of antonyms will depend on the particular context in which the word "more chambered" appears.