Antonyms for the phrase "most high-pressure" can include terms such as "low-key," "relaxed," "calm," "laid-back," and "easygoing." These words represent a more relaxed, stress-free attitude that is the complete opposite of a high-pressure situation. When a situation is low-key or easy-going, it is less likely to bring on stress and anxiety, and individuals can remain more calm and level-headed. It is essential to find a balance between high-pressure and low-pressure situations to maintain mental and physical wellbeing. And while high-pressure situations can be necessary in certain circumstances, it's important to take note of the effect they can have on our overall health and well-being.