IPA: //fɪˈlætəlɪst//
KK: /fɪˈlætəlɪst/
A person who collects or studies postage stamps.
My uncle is a philatelist who has an impressive collection of rare stamps.
Philatelist → It is formed from "philos" (from Greek, meaning love) and "ateleia" (from Greek, meaning exemption from tax). The word refers to a person who loves collecting stamps, which were historically used for tax exemption on mail.
Think of someone who 'loves' ('philos') collecting stamps that were once 'exempt from tax' ('ateleia') — that's why a philatelist is a stamp collector.