IPA: /ˈkreɪənɪst/
KK: /ˈkreɪənɪst/
A person who creates drawings or sketches using crayons.
The crayonist filled the page with colorful drawings of animals.
Crayonist is formed from "crayon" (from French *crayon*, meaning pencil or chalk) and "-ist" (meaning one who practices or is concerned with). A crayonist is someone who uses crayons, typically in artistic endeavors.
Think of a 'crayon' as a tool for drawing, and '-ist' means a person who practices that art. So, a crayonist is someone who creates art using crayons.