Where does “ψηφιακός” come from?

ψηφιακός (Greek) comes from English digital, from Latin digitālis, from Latin digitus, from Proto-Indo-European deyḱ- — to point out.

ψηφιακός (Greek): digital

Definitions

ψηφιακός traces back through two separate lines of ancestry.

Step	Language	Word	Meaning
1	English	digital	Having to do with digits (fingers or toes); especially, performed with a finger
2	Latin	digitālis	Of or belonging to the finger
3	Latin	digitus	a finger, toe, digit; a twig
4	Proto-Indo-European	deyḱ-	to point out

Step	Language	Word	Meaning
1	Greek	ψηφίο	digit, numeral
2	Ancient Greek	ψηφίον	small pebble, (piece of) gravel
3	Ancient Greek	ψῆφος	a pebble; a pebble used for reckoning, a counter;...
4	Ancient Greek	ψάω	to touch lightly, rub, wipe, rub smooth; to...