Charge up is an expression that depicts the action of giving energy or power to someone or something. Antonyms for "charge up" are contexts in which there is no power or energy involved. Examples of antonyms for "charge up" are "drain," "weaken," "exhaust," "discharge," and "unload." When we talk about draining, we mean removing power or energy from something. Weaken means to make something less strong, powerful or effective. Exhaust is a state of complete depletion of energy or resources. Discharge denotes the release of something after accumulation, and unload is to strip away energy or power from something. All these terms are negative antonyms for "charge up.