nonchalance
🇺🇸
/ˌnɑːnʃəˈlɑːns/
🇬🇧
/ˈnɒnʃələns/
When someone is calm and does not seem worried or eager.
She answered the questions with nonchalance, looking completely relaxed.
그녀는 질문에 대답하면서 완전히 편안해 보였습니다.