Where does “sandbank” come from?

I notice the chain provided contains only English entries repeating "sandpiper" and "sand," which doesn't constitute a genuine etymological chain tracing the word to an earlier language. I cannot write an accurate etymology sentence without a proper chain showing the word's development through earlier languages (such as Old English, Proto-Germanic, Proto-Indo-European, etc.). To write a compliant sentence, I would need a chain like: English sandbank | Old English sand + bank | Proto-Germanic *sand- + *bank-. Could you provide the correct etymological chain?

sandbank (English): A ridge of sand along a shore that is partially...

Definitions

  1. A ridge of sand along a shore that is partially...

Ancestry of “sandbank”, step by step

sandbank traces back through two separate lines of ancestry.

via English Bank

StepLanguageWordMeaning
1EnglishBankA major London Underground station in the City of London, named after the Bank of England and one of the busiest stations on the network OS grid ref TQ3281
2Swedishbänkbench, a long sofa without bolster; bench; where...
3Dutchbankbench; couch, sofa; place where seashells are...
4Italianbancodesk; counter; bench, table
5Old High Germanbankbench
6Proto-West Germanicbankibench
7Proto-Germanicbankiza raised surface; bulge; hillock; slope; bench
8Proto-Indo-Europeanbʰeg-to break

via English sand

StepLanguageWordMeaning
1EnglishsandRock that is ground more finely than gravel, but...
2Middle EnglishsondAlternative form of sand
3Old Englishsandaction of sending, embassy, mission, deputation;...
4Norwegian Nynorsksamdin agreement
5Proto-Germanicsamdazsand
6Proto-Indo-Europeansámh₂dʰossand
7Proto-Indo-Europeansem-together, one
Every word from Proto-Indo-European bʰeg-Every word from Proto-Germanic bankizEvery word from Proto-West Germanic banki