Where does “moissonneur” come from?

moissonneur (French) comes from French moissonner, from French moisson, from Old French messon, from Latin messio, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere — small stone, pebble; gravel, rubble.

moissonneur (French): harvester, reaper

Definitions

harvester, reaper

Ancestry of “moissonneur”, step by step

Step	Language	Word	Meaning
1	French	moissonner	to harvest
2	French	moisson	harvest
3	Old French	messon	harvest
4	Latin	messio	reaping
5	Latin	-tiō	tion, -ation, -ing
6	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
7	Latin	dissertus	arranged, disposed; explained
8	Latin	disserere	second-person singular future passive indicative...
9	Latin	dis-	asunder, apart, in two; reversal, removal;...
10	Latin	calceus	shoe
11	Latin	calx	limestone; chalk; the finish line
12	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

Every word from Ancient Greek χάλιξ →Every word from Latin -tiō →Every word from Latin dis- →