Preapprehension is a state of mind where one is anxious or fearful of something before it even happens. Its antonyms are calmness, composure, and assurance. These words signify a sense of confidence and tranquility in the face of an uncertain future. Confidence is the feeling of trust in oneself or others, while composure is the ability to remain calm and steady even in the midst of chaos. Assurance, on the other hand, represents a strong sense of conviction and belief in a positive outcome. These antonyms of preapprehension are essential in instilling a sense of positivity and hope in individuals faced with uncertainty or challenging situations.