Where does “funzionamento” come from?

funzionamento (Italian) comes from Italian funzionare, from French fonctionner, from French fonction, from Middle French function, from Latin functiō, from Latin -tiō, from Latin dissertātiō, from Latin dissertus — small stone, pebble; gravel, rubble.

funzionamento (Italian): working, operation, functioning

Definitions

working, operation, functioning

Ancestry of “funzionamento”, step by step

Step	Language	Word	Meaning
1	Italian	funzionare	to work, to function
2	French	fonctionner	to function, to work
3	French	fonction	function; role
4	Middle French	function	function what something's intended use is
5	Latin	functiō	performance, execution (of a task)
6	Latin	-tiō	tion, -ation, -ing
7	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
8	Latin	dissertus	arranged, disposed; explained
9	Latin	disserere	second-person singular future passive indicative...
10	Latin	dis-	asunder, apart, in two; reversal, removal;...
11	Latin	calceus	shoe
12	Latin	calx	limestone; chalk; the finish line
13	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

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