For "eager" or "enthusiastic":
* Masigasig - This is the most common and direct translation for "keen" in this context. It emphasizes dedication and zeal.
* Masaya - This means "happy" and can also convey enthusiasm.
* Masigla - This translates to "lively" and indicates a high level of energy and excitement.
* Nangungusap - This means "eager" and implies a strong desire for something.
For "sharp" or "intense":
* Matatalas - This translates to "sharp" and can be used for something like a keen mind or observation.
* Malakas - This means "strong" and can also imply intensity.
For "intense" or "deep":
* Malalim - This means "deep" and can be used for a keen interest or a deep understanding.
* Malakas - As mentioned above, this can also imply intensity in this context.
Ultimately, the best translation depends on the specific context and the nuance you want to convey.