Most percipient refers to someone who is highly observant and insightful. Antonyms for this phrase would include words like unintelligent, ignorant, obtuse, dull, and clueless. These words represent the opposite of being perceptive or having keen senses. Someone who is not perceptive might be called naive or foolish. They might not pick up on subtle nuances or be unable to process information in a meaningful way. In contrast, being percipient is an important trait when it comes to understanding people and the world around us, as it allows us to see things that others might miss.