IPA: /ɪnˈkwaɪər/
KK: /ɪnˈkwaɪər/
A person who asks for information or seeks to learn something.
The enquirer wanted to know more about the job application process.
Enquirer → It is formed from "enquire" (from Old French *enquerre*, meaning to seek or ask) and "-er" (meaning a person who). An enquirer is a person who seeks information or asks questions.
Think of someone who is 'seeking' ('enquire') information — the '-er' just means a person. An enquirer is someone who asks questions.