malicious

他散布关于同事的恶意流言。

He spread ___malicious gossip about his colleague.

学校对恶意嘲弄有严格规定。

The school has a strict policy against ___malicious teasing.

那纯粹是为了毁坏她名誉的恶意流言蜚语。

That was pure ___malicious gossip designed to ruin her reputation.