例文（準１級）：Taciturn，Nefarious

The employee’s taciturn nature made it difficult for him to build
strong relationships with his colleagues, but his nefarious actions of
embezzlement ultimately led to his downfall.
(その従業員の無口な性格は同僚との強い関係構築を難しくしていたが、彼の金銭着服という邪悪な行為が最終的に彼を転落させた。)

Taciturn： 無口な
Nefarious： 邪悪な