Formal/Literary:
* Di-maipaliwanag: This is the most literal translation and means "cannot be explained". It's a good choice when you want to emphasize the impossibility of describing something.
* Walang katulad: This means "without equal" or "unparalleled" and suggests that something is so unique that it cannot be compared to anything else.
* Hindi masasalaysay: This translates to "cannot be narrated" and emphasizes the inability to put something into words.
Informal/Colloquial:
* Walang salita: This literally means "no words" and is a simple and direct way of expressing that something is indescribable.
* Parang di totoo: This means "like it's not real" and suggests that something is so amazing or unbelievable that it's hard to grasp.
* Nakakabigla: This means "shocking" and can be used when something is so surprising or overwhelming that it's hard to describe.
Other options:
* Walang katumbas: This translates to "without equivalent" and suggests that something is so exceptional that it has no equal.
* Labis na maganda/masama/nakakatuwa: This means "excessively beautiful/bad/funny" and can be used when something is so intense that it's hard to put into words.
Ultimately, the best way to express "indescribable" in Tagalog will depend on the specific context and the nuance you want to convey.