Antonyms of the term "most overpowered" include "underpowered," "weak," "ineffective," "feeble," and "subpar." These words all suggest a lack of strength or power, both physically and metaphorically. When something is described as "underpowered," it means that it does not have enough power to perform its intended function. "Weak" and "ineffective" imply that something lacks the necessary force or capability to achieve a particular outcome. "Feeble" suggests something is physically weak or frail, while "subpar" means something falls short of expected standards. In contrast to being "overpowered," these antonyms describe things that are lacking in power and may struggle to achieve their intended purpose.