The word 把握 is formed by combining two characters, 把 and 握, which both independently carry the core meaning of "to grasp" or "to hold" in a physical sense. By joining these two synonyms, the compound powerfully reinforces and intensifies the concept of seizing or holding firmly. This concrete, physical imagery is then extended metaphorically to express the abstract idea of having a firm "grip" on a situation, opportunity, or understanding, thus forming the meaning of "to grasp" in the sense of certainty or control.