Where does “донельзя” come from?

донельзя (Russian) comes from Russian нельзя́, from Russian не, from Proto-Slavic ne, from Proto-Balto-Slavic nē, from Proto-Indo-European né — not; no.

донельзя (Russian): totally, utterly, completely

Definitions

totally, utterly, completely

Ancestry of “донельзя”, step by step

Step	Language	Word	Meaning
1	Russian	нельзя́	—
2	Russian	не	not, no, -n't, without; Idiomatic negative usage;...
3	Proto-Slavic	ne	not
4	Proto-Balto-Slavic	nē	not
5	Proto-Indo-European	né	not; no

Every word from Proto-Indo-European né →Every word from Proto-Balto-Slavic nē →Every word from Proto-Slavic ne →