Formal:
* Matigas ang ulo (literally "hard-headed"): This is the most common and direct translation of "stubborn." It emphasizes the person's inflexibility and unwillingness to change their mind.
* Mahigpit ang pagkakahawak (literally "firm grip"): This phrase describes someone who holds onto their opinions or beliefs very tightly.
Informal:
* Sulpot (slang): This word is a more informal and playful way to describe someone who is stubborn. It suggests a person who is stubborn in a way that's more annoying than malicious.
* Pasaway (slang): This word implies a person who is disobedient and doesn't listen to others, often in a rebellious way.
* Makulit (slang): This word refers to someone who is persistent and doesn't give up easily, even when they are told to stop.
Other expressions:
* Ayaw magpatalo (literally "doesn't want to lose"): This phrase describes someone who is stubborn and competitive, always wanting to win.
* Hindi marunong magbigay daan (literally "doesn't know how to give way"): This expression describes someone who is inflexible and unwilling to compromise.
The best word to use will depend on the specific situation and the speaker's relationship with the person being described.