noun
deficit
DEF-ih-sit/ˈdefɪsɪt/
An amount by which something falls short of what is needed or expected.
The three empty slots reveal a deficit in the row of coins.

Etymology
These pieces form a Latin verb meaning “fail” or “be deficient.” Its form meaning “it is wanting” introduced inventory clauses and became a noun for the amount missing.
In context
a country spent 16% more than it collected which doesn't exactly sound sustainable especially since that money has to usually be borrowed thereby increasing the national debt deficit spending is one of the most politically charged topics
More examples
- A rainfall deficit leaves the fields unusually dry.
- They overcome a ten-point deficit to win the game.
- A calorie deficit means you consume less energy than you use.
Forms
deficit · deficits
deficient adjective — Having less than the necessary amount.
Similar words
- shortfall
- Similarly names the gap between actual and required amounts.
- shortage
- Emphasizes insufficient supply rather than the exact missing amount.