The word "more ungrounded" suggests a lack of stability or foundation in thought or action. Antonyms for this phrase would include terms that connote a sense of stability, rationality, and groundedness. Such antonyms might include terms like "rational," "logical," "sensible," "practical," "sane," "balanced," and "judicious." These words imply a reasoned and measured approach to decision-making and problem-solving, rather than relying on impulsive or thoughtless actions. Being grounded also suggests being connected to reality and having a firm grasp on the situation at hand, unlike being ungrounded, which implies being out of touch or unmoored.