The antonyms for the word "more high-power" include low-powered, underpowered, weak, feeble, and powerless. These words denote a lack of strength, vigor or force. For instance, low-powered implies that something is weak or inefficient, while underpowered suggests a lack of energy or ability to perform effectively. Weak signifies a lack of strength or power, and feeble refers to something that is frail or lacking in vitality. Finally, powerless implies a complete absence of strength, ability or influence. In sum, these antonyms paint a picture of the opposite of the high-power that the original word stands for.