Here are some other possible translations depending on the context:
* Mapang-api: This word implies a more active and oppressive form of cruelty.
* Walang awa: This literally means "without pity" and implies a lack of compassion.
* Masama: This is a more general term for "evil" or "wicked" and can also be used to describe cruelty.
* Brutal: This is a direct borrowing from English and is commonly used in Tagalog.
The best translation will depend on the specific context and the nuances of the situation.