Where does “fechadura” come from?

fechadura (Portuguese) comes from Portuguese Fechar, from Portuguese Des-, from Portuguese encriptação, from Portuguese -ção, from Latin -tiō, from Latin dissertātiō, from Latin dissertus, from Latin disserere — small stone, pebble; gravel, rubble.

fechadura (Portuguese): lock

Definitions

lock

Ancestry of “fechadura”, step by step

fechadura traces back through two separate lines of ancestry.

via Portuguese Fechar

Step	Language	Word	Meaning
1	Portuguese	Fechar	to close
2	Portuguese	Des-	un-; de-; dis- forms verbs indicating the reversal of the prefixed verb
3	Portuguese	encriptação	encryption
4	Portuguese	-ção	-tion
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

via Fala fechal

Step	Language	Word	Meaning
1	Fala	fechal	to close

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