pundit

A source of opinion; a critic.

A learned person.

A learned Brahman: one versed in the Sanskrit language, and in the science, laws, and religion of India: as, formerly, the Pundits of the supreme court; by extension, any learned man.

A learned man; a teacher; esp., a Brahman versed in the Sanskrit language, and in the science, laws, and religion of the Hindoos; in Cashmere, any clerk or native official.

A native surveyor in British India, trained to carry out clandestine surveillance beyond British borders.

someone who has been admitted to membership in a scholarly field