IPA: /ˈlaɪsə.nər/
KK: /ˈlaɪsənt͡sər/
A person or organization that grants permission or licenses to others, allowing them to do something that is usually restricted or regulated.
The licenser approved the new software for public use after reviewing its compliance with regulations.
Licenser → It is formed from "license" (from Old French *licence*, meaning permission or freedom) and "-er" (meaning a person who). A licenser is a person who grants permission or a license.
Think of someone who gives 'permission' ('license') — the '-er' just means a person. A licenser is someone who grants permission.