Where does “dilúvio” come from?

dilúvio (Portuguese) comes from Latin diluvium, from Latin diluo, from Latin dis-, from Latin calceus, from Latin calx, from Ancient Greek χάλιξ — small stone, pebble; gravel, rubble.

dilúvio (Portuguese): deluge, flood; downpour

Definitions

deluge, flood; downpour

Ancestry of “dilúvio”, step by step

Step	Language	Word	Meaning
1	Latin	diluvium	a flood
2	Latin	diluo	I wash away; I drench or moisten; I purge, clear...
3	Latin	dis-	asunder, apart, in two; reversal, removal;...
4	Latin	calceus	shoe
5	Latin	calx	limestone; chalk; the finish line
6	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

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