MEANS calmness and composure, especially in a difficult situation.The synonyms of the given word 'equanimity' are "patiently, calmness, composure, cool".The synonym of the given word 'equanimity' is 'patiently' since both have a similar meaning.The word 'patiently' means in a way that shows tolerance of delays, problems, or suffering WITHOUT becoming annoyed or anxious.Hence, the correct answer is 'patiently'.Let's look at the meaning of the other given options- WORDS MEANING CARELESSLY in a casual or RECKLESS way; inattentively excitedly in a very enthusiastic and eager manner half-heartedly without enthusiasm or energy The antonyms of the given word 'equanimity' are "agitation, discomposure, perturbation".