unkind

It was very unkind of the group to laugh at the new student when he tripped and fell in the cafeteria.

(Chinese) 当新生在食堂绊倒时，那群人嘲笑他，真是太不友善了。

The film critic was notoriously unkind, often writing reviews that focused more on personal insults than the acting.

(Chinese) 那位影评人是出了名的刻薄，写的评论往往更多地集中在人身攻击而非演技上。