Where does “niemowlątko” come from?

niemowlątko (Polish) comes from Polish niemowlę, from Polish nie, from Old Polish nie, from Proto-Slavic ne, from Proto-Balto-Slavic nē, from Proto-Indo-European né — not; no.

Ancestry of “niemowlątko”, step by step

StepLanguageWordMeaning
1Polishniemowlęinfant, baby
2Polishnieno; not; don't, didn't "etc."; accusative...
3Old Polishnienegation particle; no, not
4Proto-Slavicnenot
5Proto-Balto-Slavicnēnot
6Proto-Indo-Europeannénot; no
Every word from Proto-Indo-European né →Every word from Proto-Balto-Slavic nē →Every word from Proto-Slavic ne →