What is capital?
The word capital is another word for money; or the machines, tools, and buildings used in the production of goods and services
"A capital" can be a capital letter (upper case).
"A capital" is also a city that is the seat of government for a nation or state, or sometimes smaller government divisions.
A+man-made goods used in the process of producing other goods
Capital is any monetary wealth (cash, stocks, loans, etc.) or machines (computers, assembly-line machines, lawnmowers, etc.) used to produce goods and services. This is contrasted with labor, which is any human input to the production of good and services.