1. Radikal (pronounced "ra-di-kal") - This is the most common and direct translation of "radical" in Tagalog. It refers to something extreme, revolutionary, or fundamental in nature.
2. Matindi (pronounced "ma-tin-di") - This word means "intense" or "strong" and can be used to convey the radical aspect of something.
3. Mabalasik (pronounced "ma-ba-la-sik") - This word means "fierce" or "violent" and can be used to describe radical actions or ideas.
4. Rebolusyonaryo (pronounced "re-bo-lu-syo-na-ryo") - This word means "revolutionary" and is used to describe something that aims to overthrow an existing system.
5. Pang-ugat (pronounced "pang-u-gat") - This word literally means "root" and can be used metaphorically to refer to the fundamental or underlying aspect of something.
The specific translation you choose will depend on the context in which you are using the word "radical."