The phrase "high as a kite" typically describes a state of being under the influence of drugs or alcohol, but there are several antonyms that represent the opposite. These include being sober, clear-headed, lucid, grounded, and level-headed. To be sober means not to be affected by drugs or alcohol, while being clear-headed refers to having a sharp and focused mind. Lucid describes a state of being mentally clear and coherent. Being grounded suggests being stable and practical, not flighty or impulsive. Finally, level-headed refers to someone who is calm, rational, and able to make sound judgments even in stressful situations- the exact opposite of someone who is "high as a kite.