Definition: The word "pay" can be both a noun and a verb.
As a noun: Use "pay" to talk about money received for work or a service.
As a verb: Use "pay" when discussing the act of giving money or settling an obligation.
"Pay attention" means to focus or concentrate on something.
"Pay a visit" means to go see someone.
Payment (noun): The act of paying or the amount paid.
Paid (adjective): Having received payment.
"Pay" can also express consequences:
In the context of interest or returns:
"Pay the price": To suffer the consequences of an action.
"Pay it forward": To do something good for someone else in return for a kindness done to you.
Pay off: To settle a debt completely.
Pay up: To pay what is owed, often after being asked or reminded.
"Pay" is a versatile word in English with various uses and meanings.