Where does “*dilüw” come from?

*dilüw (Proto-Brythonic) comes from Latin dīluvium, from Latin dīluō, from Latin dis-, from Latin calceus, from Latin calx, from Ancient Greek χάλιξ — small stone, pebble; gravel, rubble.

Ancestry of “*dilüw”, step by step

Step	Language	Word	Meaning
1	Latin	dīluvium	a flood
2	Latin	dīluō	to wash away
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

Words derived from “*dilüw”

dilyw
dilyw

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