Where does “professional” come from?

professional (Dutch) comes from English professional, from English profession, from Anglo-Norman professioun, from Old French profession, from Latin professiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus — small stone, pebble; gravel, rubble.

professional (Dutch): a professional practicioner of a trade, métier.;...

Definitions

  1. a professional practicioner of a trade, métier.;...

Ancestry of “professional”, step by step

StepLanguageWordMeaning
1EnglishprofessionalA person who belongs to a profession; A person...
2EnglishprofessionA declaration of belief, faith or one's opinion,...
3Anglo-Normanprofessioun
4Old Frenchprofessionprofession; declaration
5Latinprofessiōdeclaration, avowal, profession (act of professing)
6Latin-tiōtion, -ation, -ing
7Latindissertātiō(spoken) dissertation, discourse, disquisition
8Latindissertusarranged, disposed; explained
9Latindissereresecond-person singular future passive indicative...
10Latindis-asunder, apart, in two; reversal, removal;...
11Latincalceusshoe
12Latincalxlimestone; chalk; the finish line
13Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

Words derived from “professional

Every word from Ancient Greek χάλιξEvery word from Latin -tiōEvery word from Latin dis-
professional — Etymology, Origin & Word History | Etymology Explorer