Where does “dĺžka” come from?

dĺžka (Slovak) comes from Slovak dlhý, from Proto-Slavic dь̀lgъ, from Proto-Balto-Slavic dílˀgas, from Proto-Indo-European dl̥h₁gʰós — long.

dĺžka (Slovak): length

Definitions

Step	Language	Word	Meaning
1	Slovak	dlhý	long
2	Proto-Slavic	dь̀lgъ	—
3	Proto-Balto-Slavic	dílˀgas	long
4	Proto-Indo-European	dl̥h₁gʰós	long

dĺžka — Etymology, Origin & Word History | Etymology Explorer