the.com/practitioner
Someone who actually does the thing, not just talks about it at parties.
means A person actively engaged in a profession, discipline, or skill, especially medicine or law.
from From Latin practicare, to perform or carry out, via the Old French practique; the awkward extra syllable in practitioner is a centuries-old typo nobody bothered to fix.
General practitionerThe doctor who knows a little about everything.
Awkward wordThat stray -tion- has no business being there.
Practice vs practiseBritish English splits noun from verb; Americans skip the drama.