revenue
The French word 'revenu' is used in contexts same as the English 'revenue'. It refers to the income that a business has from its normal business activities, usually from the sale of goods and services to customers. 'Revenu' is a masculine noun in French.
My income has increased this year.
This sentence is talking about the speaker's personal income growth within a specific time frame, which is this year.
He spends half of his income on food.
The sentence is commenting on the individual's spending habits where he spends a considerable portion of his income, in this case, 50 percent, on food.
The average income per capita is quite high in this country.
This sentence is discussing the average income per person (per capita) in a particular country, indicating that it is comparatively high.