IPA: /ˈpaɪəˌtɪst/
KK: /ˈpaɪəˌtɪst/
A person who is part of a movement that emphasizes personal faith and devotion, often associated with religious reform in Protestant churches during the 17th century in Germany.
The pietist believed in the importance of personal faith over mere ritual.
Pietist → It is derived from "pietas" (meaning piety or devotion) in Latin, combined with the suffix "-ist" (meaning one who practices or is concerned with). A pietist is someone who is devoted to religious practices and emphasizes personal piety.
Think of 'piety' as a deep devotion to faith, and remember that a 'pietist' is someone who practices that devotion.