vindictive

被她背叛后，他变得很记仇，总是在社交媒体上诋毁她。

After being betrayed by her, he became ___vindictive and kept badmouthing her on social media.

他在法庭上提出了一个充满恶意的请求，显然是为了报复他的前合伙人。

He made a ___vindictive request in court, clearly aiming to retaliate against his former partner.