強橫

强横
qiánghèng
  1. surly and unreasoning
  2. bullying
  3. tyrannical

CEDICT

arrogant and unreasonable

Wiktionary

蠻不講理。《初刻拍案驚奇．卷十五》：「恁般強橫，今日又將我家人收留謀死了他，正好公報私仇，卻饒不得。」《文明小史．第三十一回》：「自從義和拳亂後，便也大家知道害怕，不敢得罪洋人，不然德國人那樣強橫，竟也相安無事。」也作「彊橫」。

重編國語辭典

強悍、霸道而不講理

維基詞典

Entry Composition

1 強 qiáng
  1. strong
  2. powerful
  3. better
  4. slightly more than
  5. vigorous
  6. violent
  7. best in their category, e.g. see 百強 bǎiqiáng
2 橫 hèng
  1. harsh and unreasonable
  2. unexpected

Related entries

霸凌 bàlíng (loanword) bullying
蠻 mán
  1. barbarian
  2. bullying
  3. very
  4. quite
  5. rough
  6. reckless
這兒蠻吵的。

There's a lot of noise here.

Source: Tatoeba

無道 wúdào
  1. tyrannical
  2. brutal (regime)
兇戾 xiōnglì
  1. cruel
  2. tyrannical
暴虐 bàonüè
  1. brutal
  2. tyrannical