What is the meaning of Prosty?

A prostitute.

straight (not curved or bent)

simple (plain, ordinary, unsophisticated)

simple (humble or non-distinct)

simple (not complicated)

righteous, just, noble; right, proper

direct (honest, open, non-evasive)

simple (comprised of a single element)

simple (not important or meaning little)

ignoble person, common person (person not belonging to the noble class)

straight (not curved or bent)

simple (uneducated and uncultured)

simple (non-distinct)

simple (without decorations, etc.)

simple (easy to do or understand)

simple (natural and obvious)

simple (composed of a single element)

right (90°)

straight, direct

dressed rurally

synonym of ciemnoczerwony

cross, jab, straight punch

straight

simple, easy

Source: wiktionary.org