If you say that someone is high-handed, you disapprove of them because they use their authority in an unnecessarily forceful way without considering other people's feelings.
例句
He wants to be seen as less bossy and high-handed.他不想讓自己顯得太專橫霸道。...his allegedly high-handed organisation of government business in parliament.據傳他在議會中處理政府事務時專橫跋扈的作風