Multiple choice Directions: Choose the option which is not the synonym of the word in question. Casual regular nonchalant lackadaisical apathetic Reveal answer Fill a bubble to check yourself A Correct answer Explanation Casual in this context means showing lack of care or concern. Nonchalant (B), lackadaisical (C), and apathetic (D) all mean uninterested or indifferent. Regular (A) means consistent or following a pattern - unrelated to the carefree attitude.