The phrase "be on an even keel" implies a sense of balance and stability. Antonyms for this phrase include being unbalanced, unstable, uneven, unsettled, and inconsistent. These contrasting terms suggest a state of flux, where things are not steady, predictable, or reliable. Being on an even keel can refer to one's emotional state, mental health, physical well-being, and financial stability. Antonyms for this phrase may indicate a lack of harmony, equilibrium, or symmetry, and may denote a sense of chaos, confusion, or turmoil. In contrast, being on an even keel suggests a sense of calmness, clarity, and control.