悪あく癖へき

noun

bad habit; vice

Refers to a persistent undesirable personal habit or moral failing.

• 彼かれの悪あく癖へきは、つい嘘うそをついてしまうことだ。

  His bad habit is that he can't help telling lies.

• 喫きつ煙えんは健けん康こうに悪わるい悪あく癖へきだ。

  Smoking is a bad habit that harms your health.