Prosper etymology in English

English word prosper comes from Latin pro, Latin spes (Expectation. Hope.), Latin spebus

Dictionary entry	Language	Definition
pro	Latin (lat)	About. According to. As befitting. As, like. Before. For. In front, instead of. On behalf of.
spes	Latin (lat)	Expectation. Hope.
spebus	Latin (lat)
pro spere	English (en)
prosperus	Latin (lat)	Favourable, propitious. Prosperous, successful.
prosperare	Latin (lat)
prospero	Latin (lat)	I further (cause to succeed). I propitiate.
prosperer	Old French (fro)	To be favorable. To favor.
prosper	English (en)	(intransitive) To be successful; to succeed; to be fortunate or prosperous; to thrive; to make gain.. (intransitive) To grow; to increase.. (transitive) To favor; to render successful.

Prosper etymology