Where does “nappy bank” come from?

nappy bank (English) comes from English nappy, from English NAP, from French napper, from French -er, from English -er, from Middle English -er, from Old French -er, from Latin -āre — he, she.

Ancestry of “nappy bank”, step by step

nappy bank traces back through two separate lines of ancestry.

via English nappy

StepLanguageWordMeaning
1EnglishnappyAn absorbent garment worn by a baby who does not...
2EnglishNAPAcronym of non-aggression principle; Acronym of...
3Frenchnapperto cover
4French-erForms infinitives of first-conjugation verbs
5English-erA person or thing that does an action indicated...
6Middle English-eragentive suffix; agent noun suffix
7Old French-erAlternative form of -ier, verbal suffix;...
8Latin-ārefirst conjugation
9Proto-Italic-āōForms primarily denominative verbs
10Proto-Indo-European-eh₂yétiCreates iterative/ frequentative/ intensive...
11Proto-Indo-European-yétiCreates intransitive, often deponent,...
12Proto-Indo-Europeanyé-
13Chichewaiyehe, she

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
Every word from Chichewa iye