অনিষ্ট (Bengali) comes from Sanskrit अनिष्ट, from Sanskrit इष्ट, from Proto-Indo-Aryan Hiṣṭás, from Proto-Indo-Iranian Hištás, from Proto-Indo-European h₂is-tós, from Proto-Indo-European h₂eys- — to wish; to request.
অনিষ্ট (Bengali): harm, damage, injury, loss