Where does “tachigrafia” come from?

tachigrafia (Italian) comes from Italian tachi-, from Ancient Greek ταχύς, from Proto-Indo-European dʰn̥gʰ-, from Proto-Indo-European dʰengʰ- — to cover; to overcast.

tachigrafia (Italian): tachygraphy, shorthand

Definitions

tachygraphy, shorthand

Ancestry of “tachigrafia”, step by step

Step	Language	Word	Meaning
1	Italian	tachi-	tachy-
2	Ancient Greek	ταχύς	swift, quick, fast, rapid; In a short time: soon
3	Proto-Indo-European	dʰn̥gʰ-	—
4	Proto-Indo-European	dʰengʰ-	to cover; to overcast

Every word from Proto-Indo-European dʰengʰ- →Every word from Proto-Indo-European dʰn̥gʰ- →Every word from Ancient Greek ταχύς →