inexcusably
🇺🇸
/ˌɪnɪkˈskjuːzəbli/
🇬🇧
/ˌɪnɪkˈskjuːzəbli/
in a way that is very wrong and cannot be forgiven
It was inexcusably rude to arrive late without calling.
在没有打电话的情况下迟到是不可原谅的粗鲁。