The antonyms for the word "more uncontainable" are "containable," "manageable," and "restricted." Something that is containable can be controlled, restrained, or kept within limits, whereas something that is uncontainable is too powerful or too intense to be controlled or limited. Similarly, something that is manageable can be handled, governed, or supervised, while something that is more uncontainable is beyond control. Finally, something that is restricted is limited, regulated, or confined, whereas something that is more uncontainable is unregulated and unrestricted. Therefore, the antonyms of "more uncontainable" imply a sense of control, order, and restriction.