The antonyms for the phrase "keeping from falling" are "letting go" or "dropping." When you hold onto something to keep it from falling, you use your strength and grip to keep it secured. However, when you let go, you allow it to fall freely. Letting go can be intentional, as in the case of intentionally dropping an object, or unintentional, as in the case of losing your grip on something you were trying to hold onto. While keeping from falling is a sign of strength and control, letting go can be liberating and signifies the release of control.