居心不良

jūxīnbùliáng
to harbor evil intentions (idiom)

CEDICT

to harbor bad intentions; to be malicious

Wiktionary

心怀不轨，内心存着坏念头。

重編國語辭典

内心藏着害人意图

維基詞典

Entry Composition

1 居心 jūxīn
  1. to harbor (evil) intentions
  2. to be bent on
  3. a tranquil heart or mind
2 不良 bùliáng
  1. bad; harmful; unhealthy
  2. (of a device, connection, material etc) defective; faulty

Related entries

藏奸 cángjiān to harbor evil intentions