The antonyms for the word "more insuppressible" would be "containable," "restrainable," "controlled," and "manageable." If something is insuppressible, it means it cannot be controlled, contained, or managed. However, in some situations, it may be necessary to do so, which is where the antonyms come into play. When something is containable or manageable, it means that you have the ability to keep it under control and prevent it from becoming out of hand. While it's important to allow yourself to be passionate and free, it's also important to know when to rein it in and keep it in check.