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The possessive form of the noun bourgeoisie is bourgeoisie's.
Example: The bourgeoisie's vote is very important in this race.
There is no class in between the proletariat (workers) and bourgeoisie (capitalists).
The bourgeoisie is the ruling/leech class. The bourgeoisie lives off the efforts of others and adds little if nothing to society.
The bourgeoisie class was referred to the middle class in society.
the bourgeoisie lived in beautiful homes decorated with silk.