Income
Etymology
A plain English compound of "in" + "come" — literally that which comes in. It began in Middle English meaning an arrival or entrance before narrowing to money received. Its transparency contrasts with its Latin-rooted cousin "revenue", which carries the same idea through French.
noun · /IN-kum/
The money a person or organization receives, especially on a regular basis, from work or investments.
What it names
The inflow side of your financial life — what actually lands in your hands to spend, save, or be taxed on.
Example
A second job pushed their household income just above the threshold for the tax credit.
Related idea
Distinguish revenue: for a business, revenue is the whole top-line inflow before costs, while income (or net income) is what remains after expenses — a company can have huge revenue and no income at all.