IPA: /ˈhaɪər/
KK: /ˈhaɪər/
A person or organization that employs someone or rents something.
The hirer was pleased with the quality of the service provided by the contractor.
Hirer → It is formed from "hire" (from Old English *hyran*, meaning to pay for the use of something) and "-er" (meaning a person who). A hirer is a person who pays for the use of something.
Think of someone who 'pays for the use' of something — that's what a hirer does.