unkindness
🇺🇸
/ˌʌnˈkaɪndnəs/
🇬🇧
/ˌʌnˈkaɪndnəs/
A lack of kindness or consideration; being mean or cruel.
His unkindness towards the new student was noticed by the teacher.
그의 새 학생에 대한 비친절은 선생님에게 눈에 띄었습니다.