prostak — meaning in English

English meaning

boor noun A rude, ill-mannered person.
hick noun An unsophisticated or unfashionable person from the countryside, often used disparagingly.
oaf noun A clumsy, foolish, or unrefined person.
rube noun (informal, often derogatory) An unsophisticated or naive person, especially someone from the countryside.
simple adj Easy to understand or do; not complicated.
simpleton noun A person who lacks common sense or shows poor judgement; a foolish person.
yokel noun An unsophisticated or naive person from the countryside, often used dismissively.

prostak is used for these senses in English:

boor An uncultured person; a vulgarian.
hick (pejorative) An awkward, naive, clumsy and/or rude country person. [from early 18th c.]
oaf (pejorative) A person, especially a large male, who is clumsy or a simpleton.
rube (pejorative) An uninformed, unsophisticated, or unintelligent person.
simple (now, colloquial, euphemism) Feeble-minded; foolish.
simpleton (informal, pejorative) A simple-minded person lacking common sense.
yokel (pejorative) A person from or living in the countryside, viewed as being unsophisticated or naive.