Where does “sych” come from?

sych (Welsh) comes from Middle Welsh sych, from Old Welsh sich, from Proto-Brythonic sɨx, from Latin siccus, from Proto-Celtic siskʷos, from Proto-Indo-European sisku-.

sych (Welsh): dry, arid; third-person singular present...

Definitions

dry, arid; third-person singular present...

Ancestry of “sych”, step by step

Step	Language	Word	Meaning
1	Middle Welsh	sych	—
2	Old Welsh	sich	—
3	Proto-Brythonic	sɨx	dry
4	Latin	siccus	dry; sober; thirsty
5	Proto-Celtic	siskʷos	dry
6	Proto-Indo-European	sisku-	—

Words derived from “sych”

sychu
sech
sychdarthu
sychder
sychdwr
sychin
sychnant
sychwr

Every word from Proto-Indo-European sisku- →Every word from Proto-Celtic siskʷos →Every word from Latin siccus →