Where does “oppslutte” come from?

oppslutte (Norwegian Bokmål) comes from Norwegian Bokmål slutte, from Middle Low German slūten, from Old Saxon slūtan, from Proto-West Germanic *sleutan, from Proto-Germanic sleutaną, from Proto-Indo-European (s)klewd-, from Proto-Indo-European (s)kleh₂w-, from Proto-Indo-European (s)kel- — to bend, crook; bent, crooked; leg, heel, knee,...

Ancestry of “oppslutte”, step by step

oppslutte traces back through two separate lines of ancestry.

via Norwegian Bokmål slutte

StepLanguageWordMeaning
1Norwegian Bokmålslutteto end; to complete; to conclude
2Middle Low Germanslūtento close
3Old Saxonslūtanto close, conclude, lock
4Proto-West Germanic*sleutanto bolt, lock
5Proto-Germanicsleutanąto bolt, lock; to shut, close
6Proto-Indo-European(s)klewd-to lock
7Proto-Indo-European(s)kleh₂w-a hook, crook, peg
8Proto-Indo-European(s)kel-to bend, crook; bent, crooked; leg, heel, knee,...

via Norwegian Bokmål opp

StepLanguageWordMeaning
1Norwegian Bokmåloppup
2Danishopup
3Old Norseuppup
4Proto-Germanicuppup, upwards
5Proto-Germanicubunder
6Proto-Indo-Europeanupóunder, below
7Proto-Indo-Europeanh₃ewp-
Every word from Proto-Indo-European (s)kel-Every word from Proto-Indo-European (s)kleh₂w-Every word from Proto-Indo-European (s)klewd-