Where does “nappy sprayer” come from?

nappy sprayer (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 sprayer”, step by step

nappy sprayer 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 sprayer

StepLanguageWordMeaning
1EnglishsprayerAn object used for spraying, such as a spray...
2EnglishsprayA fine, gentle, dispersed mist of liquid; A...
3Middle Dutchsprāien
4Proto-Germanicsprēwijanąto spray, sprinkle
5Proto-Indo-European(s)per-to strew, sow, sprinkle; to sow, sprinkle, strew;...
Every word from Chichewa iye