This is the 822nd most frequent Spanish word.
gasto
"Expense" or "expenditure."
Here, 'gasto' is used as a noun meaning 'expense or expenditure', referring to the amount of money spent on food in a month.
El gasto en comida mensual es alto.
The monthly expense on food is high.
In this sentence, 'gasto' is a verb (from 'gastar') meaning 'to spend or consume', used in the first-person singular to indicate using up energy.
Gasto mucha energía durante el día.
I spend a lot of energy during the day.
In this example, 'gasto' is a noun referring to 'spending or expenditure', specifically related to public or governmental expenditures.