Where does “agitationist” come from?

agitationist (English) comes from English agitation, from French agitation, from Latin agitatio, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere, from Latin dis- — small stone, pebble; gravel, rubble.

Ancestry of “agitationist”, step by step

agitationist traces back through two separate lines of ancestry.

via English agitation

StepLanguageWordMeaning
1EnglishagitationThe act of agitating, or the state of being...
2Frenchagitationchoppiness (of water), turbulence (in air), swaying (of branch etc.)
3Latinagitatiomotion, movement, agitation; activity
4Latin-tiōtion, -ation, -ing
5Latindissertātiō(spoken) dissertation, discourse, disquisition
6Latindissertusarranged, disposed; explained
7Latindissereresecond-person singular future passive indicative...
8Latindis-asunder, apart, in two; reversal, removal;...
9Latincalceusshoe
10Latincalxlimestone; chalk; the finish line
11Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English ist

StepLanguageWordMeaning
1EnglishistA practitioner or supporter of an ism
2English-istAdded to words to form nouns denoting
3Old French-iste
4Latin-ista-ist; one who practises or believes
5Ancient Greek-ιστήςAlternative form of -τής; -ist
6Ancient Greek-τήςAppended to verbs to form agent nouns
7Proto-Hellenic-tās
Every word from Ancient Greek χάλιξEvery word from Latin -tiōEvery word from Latin dis-