Where does “funcionar” come from?

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

funcionar (Portuguese): to work; to function

Definitions

to work; to function

Ancestry of “funcionar”, step by step

Step	Language	Word	Meaning
1	French	fonctionner	to function, to work
2	French	fonction	function; role
3	Middle French	function	function what something's intended use is
4	Latin	functiō	performance, execution (of a task)
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- →