Where does “sáňky” come from?

sáňky (Czech) comes from Czech sáně, from Old Czech [[sáni]] ([[sáně]], [[saně]]), from Proto-Slavic sanь, from Proto-Balto-Slavic śaʔnos.

sáňky (Czech): sled

Definitions

Step	Language	Word	Meaning
1	Czech	sáně	sledge, sled
2	Old Czech	[[sáni]] ([[sáně]], [[saně]])	—
3	Proto-Slavic	sanь	sleigh, sledge
4	Proto-Balto-Slavic	śaʔnos	—

sáňky — Etymology, Origin & Word History | Etymology Explorer