IPA: /ˈdʒuːdoʊɪst/
KK: /ˈdʒuːdoʊɪst/
A person who practices or competes in the martial art of judo.
The judoist won a gold medal at the championship.
Judoist → It is formed from "judo" (from Japanese "柔道", meaning the gentle way) and "-ist" (meaning a person who practices or is concerned with). A judoist is a person who practices the gentle way of judo, a martial art.
Think of a judoist as someone who practices the 'gentle way' of judo, with '-ist' indicating a person involved in that practice.