For something uncommon or infrequent:
* Bihira (bee-hee-ra) - This is the most common and general term.
* Mabihir (ma-bee-heer) - This is a more formal way of saying "bihira."
* Pambihira (pam-bee-hee-ra) - This is another formal way of saying "bihira" and emphasizes the rarity of something.
For something cooked to a specific level of doneness:
* Maluto sa bihira (ma-loo-toh sa bee-hee-ra) - This means "cooked rare" and refers to meat that is still red and juicy inside.
For something valuable or precious:
* Mahalaga (ma-ha-la-ga) - This means "valuable" and can be used for things that are rare and therefore precious.
* Pambihira (pam-bee-hee-ra) - This can also be used to describe something that is valuable because it is rare.
So, the best Tagalog translation for "rare" will depend on the specific context.