Where does “smygsupning” come from?

smygsupning (Swedish) comes from Swedish smygsupa, from Swedish supa, from Old Swedish sūpa, from Old Norse súpa, from Proto-Germanic sūpaną, from Proto-Indo-European *sewb-.

Ancestry of “smygsupning”, step by step

StepLanguageWordMeaning
1Swedishsmygsupadrink alcohol on the sly
2SwedishsupaTo drink alcohol, especially excessively; To...
3Old Swedishsūpato drink
4Old Norsesúpato sip, drink
5Proto-Germanicsūpanąto drink; sip; slurp; gulp
6Proto-Indo-European*sewb-—
Every word from Proto-Indo-European *sewb- →Every word from Proto-Germanic sūpaną →Every word from Old Norse súpa →