General "expert":
* विद्वान् (vidvān): This is a very common word for "learned," "scholar," or "expert." It literally means "one who knows."
* पण्डित (paṇḍita): This word is often used for someone who is learned in a particular field, like a scholar or a specialist.
* ज्ञानी (jñānī): This means "knowledgeable" or "wise" and can also be used to describe an expert.
* तज्ज्ञ (tajña): This word is more specific and refers to someone who is an expert in a particular subject or skill.
Expert in a particular skill:
* कुशल (kuśala): This word means "skillful" or "expert" in a particular art or craft.
* दक्ष (dakṣa): This word means "competent" or "skillful," and can be used to describe an expert in a particular field.
Expert in a particular field:
* विशारद (viśārada): This word signifies someone who is well-versed in a particular subject or field.
* प्रवीण (pravīṇa): This word means "proficient" or "skilled," and can be used to describe an expert in a particular field.
The best word to use will depend on the context and the specific meaning you want to convey.