IPA: /prəˈfɛsər/
KK: /prəˈfɛsər/
A person who teaches at a college or university, usually at a high academic level.
The professor gave an interesting lecture on modern literature.
Professor → It is formed from "profiteri" (meaning to declare publicly) and the suffix "-or" (meaning one who). The word "professor" refers to one who publicly declares or teaches knowledge, typically in an academic setting.
Think of someone who 'declares' knowledge publicly — that's what a professor does.