IPA: /ˈspɪrɪtɪst/
KK: /ˈspɪrɪtɪst/
A person who believes in or practices communication with spirits, especially those of the deceased.
The spiritist held a séance to connect with the spirits of the departed.
Spiritist → It is formed from "spirit" (from Latin "spiritus", meaning breath or soul) and "-ist" (meaning one who practices or is concerned with). A spiritist is someone who practices or is concerned with the spirit or spiritual matters.
Think of 'spirit' as relating to the soul or breath, and remember that a 'spiritist' is someone who is involved with spiritual practices.